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Finding the Fourth Proportional to 15,561.76, 21,566.07 and 15,266.40

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Solution

The fourth proportional to 15,561.76, 21,566.07 and 15,266.40 is: 21,156.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,561.76 : 21,566.07 = 15,266.40 : x
  2. Step 2: Convert to fraction form
    15,561.76/21,566.07 = 15,266.40/x
  3. Step 3: Cross multiply
    15,561.76x = 21,566.07 × 15,266.40
  4. Step 4: Simplify right side
    15,561.76x = 329,236,251.05
  5. Step 5: Solve for x
    x = 329,236,251.05/15,561.76
  6. Step 6: Final answer
    x = 21,156.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.