Home / 20,557.68-28,369.08-11,605.12

Finding the Fourth Proportional to 20,557.68, 28,369.08 and 11,605.12

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Solution

The fourth proportional to 20,557.68, 28,369.08 and 11,605.12 is: 16,014.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.68 : 28,369.08 = 11,605.12 : x
  2. Step 2: Convert to fraction form
    20,557.68/28,369.08 = 11,605.12/x
  3. Step 3: Cross multiply
    20,557.68x = 28,369.08 × 11,605.12
  4. Step 4: Simplify right side
    20,557.68x = 329,226,577.69
  5. Step 5: Solve for x
    x = 329,226,577.69/20,557.68
  6. Step 6: Final answer
    x = 16,014.77

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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.