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Finding the Fourth Proportional to 11,404.04, 15,700.98 and 9,931.40

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Solution

The fourth proportional to 11,404.04, 15,700.98 and 9,931.40 is: 13,673.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,404.04 : 15,700.98 = 9,931.40 : x
  2. Step 2: Convert to fraction form
    11,404.04/15,700.98 = 9,931.40/x
  3. Step 3: Cross multiply
    11,404.04x = 15,700.98 × 9,931.40
  4. Step 4: Simplify right side
    11,404.04x = 155,932,712.77
  5. Step 5: Solve for x
    x = 155,932,712.77/11,404.04
  6. Step 6: Final answer
    x = 13,673.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.