Home / 21,191.54-31,789.08-10,656.14

Finding the Fourth Proportional to 21,191.54, 31,789.08 and 10,656.14

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Solution

The fourth proportional to 21,191.54, 31,789.08 and 10,656.14 is: 15,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.54 : 31,789.08 = 10,656.14 : x
  2. Step 2: Convert to fraction form
    21,191.54/31,789.08 = 10,656.14/x
  3. Step 3: Cross multiply
    21,191.54x = 31,789.08 × 10,656.14
  4. Step 4: Simplify right side
    21,191.54x = 338,748,966.42
  5. Step 5: Solve for x
    x = 338,748,966.42/21,191.54
  6. Step 6: Final answer
    x = 15,985.10

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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.