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Finding the Fourth Proportional to 18,820.88, 25,972.08 and 10,437.20

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Solution

The fourth proportional to 18,820.88, 25,972.08 and 10,437.20 is: 14,402.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.88 : 25,972.08 = 10,437.20 : x
  2. Step 2: Convert to fraction form
    18,820.88/25,972.08 = 10,437.20/x
  3. Step 3: Cross multiply
    18,820.88x = 25,972.08 × 10,437.20
  4. Step 4: Simplify right side
    18,820.88x = 271,075,793.38
  5. Step 5: Solve for x
    x = 271,075,793.38/18,820.88
  6. Step 6: Final answer
    x = 14,402.93

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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.