Home / 21,527.60-29,700.80-13,455.76

Finding the Fourth Proportional to 21,527.60, 29,700.80 and 13,455.76

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Solution

The fourth proportional to 21,527.60, 29,700.80 and 13,455.76 is: 18,564.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,527.60 : 29,700.80 = 13,455.76 : x
  2. Step 2: Convert to fraction form
    21,527.60/29,700.80 = 13,455.76/x
  3. Step 3: Cross multiply
    21,527.60x = 29,700.80 × 13,455.76
  4. Step 4: Simplify right side
    21,527.60x = 399,646,836.61
  5. Step 5: Solve for x
    x = 399,646,836.61/21,527.60
  6. Step 6: Final answer
    x = 18,564.39

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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.