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Finding the Fourth Proportional to 15,885.16, 21,925.82 and 9,913.30

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Solution

The fourth proportional to 15,885.16, 21,925.82 and 9,913.30 is: 13,683.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,885.16 : 21,925.82 = 9,913.30 : x
  2. Step 2: Convert to fraction form
    15,885.16/21,925.82 = 9,913.30/x
  3. Step 3: Cross multiply
    15,885.16x = 21,925.82 × 9,913.30
  4. Step 4: Simplify right side
    15,885.16x = 217,357,231.41
  5. Step 5: Solve for x
    x = 217,357,231.41/15,885.16
  6. Step 6: Final answer
    x = 13,683.04

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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.