Home / 20,280.30-30,420.51-6,240.23

Finding the Fourth Proportional to 20,280.30, 30,420.51 and 6,240.23

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Solution

The fourth proportional to 20,280.30, 30,420.51 and 6,240.23 is: 9,360.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.30 : 30,420.51 = 6,240.23 : x
  2. Step 2: Convert to fraction form
    20,280.30/30,420.51 = 6,240.23/x
  3. Step 3: Cross multiply
    20,280.30x = 30,420.51 × 6,240.23
  4. Step 4: Simplify right side
    20,280.30x = 189,830,979.12
  5. Step 5: Solve for x
    x = 189,830,979.12/20,280.30
  6. Step 6: Final answer
    x = 9,360.36

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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.