Home / 20,280.52-27,985.80-11,327.60

Finding the Fourth Proportional to 20,280.52, 27,985.80 and 11,327.60

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Solution

The fourth proportional to 20,280.52, 27,985.80 and 11,327.60 is: 15,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.52 : 27,985.80 = 11,327.60 : x
  2. Step 2: Convert to fraction form
    20,280.52/27,985.80 = 11,327.60/x
  3. Step 3: Cross multiply
    20,280.52x = 27,985.80 × 11,327.60
  4. Step 4: Simplify right side
    20,280.52x = 317,011,948.08
  5. Step 5: Solve for x
    x = 317,011,948.08/20,280.52
  6. Step 6: Final answer
    x = 15,631.35

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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.