Home / 15,681.05-21,639.33-8,966.55

Finding the Fourth Proportional to 15,681.05, 21,639.33 and 8,966.55

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Solution

The fourth proportional to 15,681.05, 21,639.33 and 8,966.55 is: 12,373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,681.05 : 21,639.33 = 8,966.55 : x
  2. Step 2: Convert to fraction form
    15,681.05/21,639.33 = 8,966.55/x
  3. Step 3: Cross multiply
    15,681.05x = 21,639.33 × 8,966.55
  4. Step 4: Simplify right side
    15,681.05x = 194,030,134.41
  5. Step 5: Solve for x
    x = 194,030,134.41/15,681.05
  6. Step 6: Final answer
    x = 12,373.55

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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.