Home / 15,715.35-21,686.94-8,641.76

Finding the Fourth Proportional to 15,715.35, 21,686.94 and 8,641.76

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Solution

The fourth proportional to 15,715.35, 21,686.94 and 8,641.76 is: 11,925.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.35 : 21,686.94 = 8,641.76 : x
  2. Step 2: Convert to fraction form
    15,715.35/21,686.94 = 8,641.76/x
  3. Step 3: Cross multiply
    15,715.35x = 21,686.94 × 8,641.76
  4. Step 4: Simplify right side
    15,715.35x = 187,413,222.18
  5. Step 5: Solve for x
    x = 187,413,222.18/15,715.35
  6. Step 6: Final answer
    x = 11,925.49

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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.