Home / 20,988.46-28,964.15-11,557.05

Finding the Fourth Proportional to 20,988.46, 28,964.15 and 11,557.05

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Solution

The fourth proportional to 20,988.46, 28,964.15 and 11,557.05 is: 15,948.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.46 : 28,964.15 = 11,557.05 : x
  2. Step 2: Convert to fraction form
    20,988.46/28,964.15 = 11,557.05/x
  3. Step 3: Cross multiply
    20,988.46x = 28,964.15 × 11,557.05
  4. Step 4: Simplify right side
    20,988.46x = 334,740,129.76
  5. Step 5: Solve for x
    x = 334,740,129.76/20,988.46
  6. Step 6: Final answer
    x = 15,948.77

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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.