Home / 28,143.37-42,220.50-8,420.23

Finding the Fourth Proportional to 28,143.37, 42,220.50 and 8,420.23

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Solution

The fourth proportional to 28,143.37, 42,220.50 and 8,420.23 is: 12,631.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.37 : 42,220.50 = 8,420.23 : x
  2. Step 2: Convert to fraction form
    28,143.37/42,220.50 = 8,420.23/x
  3. Step 3: Cross multiply
    28,143.37x = 42,220.50 × 8,420.23
  4. Step 4: Simplify right side
    28,143.37x = 355,506,320.72
  5. Step 5: Solve for x
    x = 355,506,320.72/28,143.37
  6. Step 6: Final answer
    x = 12,631.97

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Double scale
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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.