Home / 21,113.79-31,681.62-15,318.24

Finding the Fourth Proportional to 21,113.79, 31,681.62 and 15,318.24

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Solution

The fourth proportional to 21,113.79, 31,681.62 and 15,318.24 is: 22,985.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.79 : 31,681.62 = 15,318.24 : x
  2. Step 2: Convert to fraction form
    21,113.79/31,681.62 = 15,318.24/x
  3. Step 3: Cross multiply
    21,113.79x = 31,681.62 × 15,318.24
  4. Step 4: Simplify right side
    21,113.79x = 485,306,658.75
  5. Step 5: Solve for x
    x = 485,306,658.75/21,113.79
  6. Step 6: Final answer
    x = 22,985.29

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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.