Home / 28,280.18-42,420.23-7,220.23

Finding the Fourth Proportional to 28,280.18, 42,420.23 and 7,220.23

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Solution

The fourth proportional to 28,280.18, 42,420.23 and 7,220.23 is: 10,830.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,280.18 : 42,420.23 = 7,220.23 : x
  2. Step 2: Convert to fraction form
    28,280.18/42,420.23 = 7,220.23/x
  3. Step 3: Cross multiply
    28,280.18x = 42,420.23 × 7,220.23
  4. Step 4: Simplify right side
    28,280.18x = 306,283,760.28
  5. Step 5: Solve for x
    x = 306,283,760.28/28,280.18
  6. Step 6: Final answer
    x = 10,830.33

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Half scale
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Double scale
Find fourth proportional to 28,281.18, 42,421.73 and 7,221.23
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.