Home / 21,087.28-31,562.24-15,538.40

Finding the Fourth Proportional to 21,087.28, 31,562.24 and 15,538.40

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Solution

The fourth proportional to 21,087.28, 31,562.24 and 15,538.40 is: 23,256.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.28 : 31,562.24 = 15,538.40 : x
  2. Step 2: Convert to fraction form
    21,087.28/31,562.24 = 15,538.40/x
  3. Step 3: Cross multiply
    21,087.28x = 31,562.24 × 15,538.40
  4. Step 4: Simplify right side
    21,087.28x = 490,426,710.02
  5. Step 5: Solve for x
    x = 490,426,710.02/21,087.28
  6. Step 6: Final answer
    x = 23,256.99

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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.