Home / 20,515.95-28,312.20-11,562.66

Finding the Fourth Proportional to 20,515.95, 28,312.20 and 11,562.66

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Solution

The fourth proportional to 20,515.95, 28,312.20 and 11,562.66 is: 15,956.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.95 : 28,312.20 = 11,562.66 : x
  2. Step 2: Convert to fraction form
    20,515.95/28,312.20 = 11,562.66/x
  3. Step 3: Cross multiply
    20,515.95x = 28,312.20 × 11,562.66
  4. Step 4: Simplify right side
    20,515.95x = 327,364,342.45
  5. Step 5: Solve for x
    x = 327,364,342.45/20,515.95
  6. Step 6: Final answer
    x = 15,956.58

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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.