Home / 21,215.04-31,774.10-10,129.52

Finding the Fourth Proportional to 21,215.04, 31,774.10 and 10,129.52

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Solution

The fourth proportional to 21,215.04, 31,774.10 and 10,129.52 is: 15,171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.04 : 31,774.10 = 10,129.52 : x
  2. Step 2: Convert to fraction form
    21,215.04/31,774.10 = 10,129.52/x
  3. Step 3: Cross multiply
    21,215.04x = 31,774.10 × 10,129.52
  4. Step 4: Simplify right side
    21,215.04x = 321,856,381.43
  5. Step 5: Solve for x
    x = 321,856,381.43/21,215.04
  6. Step 6: Final answer
    x = 15,171.14

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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.