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Finding the Fourth Proportional to 19,937.61, 27,515.15 and 10,985.11

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Solution

The fourth proportional to 19,937.61, 27,515.15 and 10,985.11 is: 15,160.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,937.61 : 27,515.15 = 10,985.11 : x
  2. Step 2: Convert to fraction form
    19,937.61/27,515.15 = 10,985.11/x
  3. Step 3: Cross multiply
    19,937.61x = 27,515.15 × 10,985.11
  4. Step 4: Simplify right side
    19,937.61x = 302,256,949.42
  5. Step 5: Solve for x
    x = 302,256,949.42/19,937.61
  6. Step 6: Final answer
    x = 15,160.14

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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.