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Finding the Fourth Proportional to 18,915.95, 26,123.01 and 15,591.71

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Solution

The fourth proportional to 18,915.95, 26,123.01 and 15,591.71 is: 21,532.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.95 : 26,123.01 = 15,591.71 : x
  2. Step 2: Convert to fraction form
    18,915.95/26,123.01 = 15,591.71/x
  3. Step 3: Cross multiply
    18,915.95x = 26,123.01 × 15,591.71
  4. Step 4: Simplify right side
    18,915.95x = 407,302,396.25
  5. Step 5: Solve for x
    x = 407,302,396.25/18,915.95
  6. Step 6: Final answer
    x = 21,532.22

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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.