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Finding the Fourth Proportional to 15,756.99, 21,737.01 and 10,087.20

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Solution

The fourth proportional to 15,756.99, 21,737.01 and 10,087.20 is: 13,915.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.99 : 21,737.01 = 10,087.20 : x
  2. Step 2: Convert to fraction form
    15,756.99/21,737.01 = 10,087.20/x
  3. Step 3: Cross multiply
    15,756.99x = 21,737.01 × 10,087.20
  4. Step 4: Simplify right side
    15,756.99x = 219,265,567.27
  5. Step 5: Solve for x
    x = 219,265,567.27/15,756.99
  6. Step 6: Final answer
    x = 13,915.45

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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.