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Finding the Fourth Proportional to 15,152.40, 20,914.20 and 13,577.76

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Solution

The fourth proportional to 15,152.40, 20,914.20 and 13,577.76 is: 18,740.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,152.40 : 20,914.20 = 13,577.76 : x
  2. Step 2: Convert to fraction form
    15,152.40/20,914.20 = 13,577.76/x
  3. Step 3: Cross multiply
    15,152.40x = 20,914.20 × 13,577.76
  4. Step 4: Simplify right side
    15,152.40x = 283,967,988.19
  5. Step 5: Solve for x
    x = 283,967,988.19/15,152.40
  6. Step 6: Final answer
    x = 18,740.79

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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.