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Finding the Fourth Proportional to 28,402.40, 42,603.60 and 11,760.16

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Solution

The fourth proportional to 28,402.40, 42,603.60 and 11,760.16 is: 17,640.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,402.40 : 42,603.60 = 11,760.16 : x
  2. Step 2: Convert to fraction form
    28,402.40/42,603.60 = 11,760.16/x
  3. Step 3: Cross multiply
    28,402.40x = 42,603.60 × 11,760.16
  4. Step 4: Simplify right side
    28,402.40x = 501,025,152.58
  5. Step 5: Solve for x
    x = 501,025,152.58/28,402.40
  6. Step 6: Final answer
    x = 17,640.24

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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.