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Finding the Fourth Proportional to 40,807.20, 61,207.20 and 11,222.40

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Solution

The fourth proportional to 40,807.20, 61,207.20 and 11,222.40 is: 16,832.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,807.20 : 61,207.20 = 11,222.40 : x
  2. Step 2: Convert to fraction form
    40,807.20/61,207.20 = 11,222.40/x
  3. Step 3: Cross multiply
    40,807.20x = 61,207.20 × 11,222.40
  4. Step 4: Simplify right side
    40,807.20x = 686,891,681.28
  5. Step 5: Solve for x
    x = 686,891,681.28/40,807.20
  6. Step 6: Final answer
    x = 16,832.61

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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.