Home / 28,325.56-39,090-15,751.12

Finding the Fourth Proportional to 28,325.56, 39,090 and 15,751.12

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Solution

The fourth proportional to 28,325.56, 39,090 and 15,751.12 is: 21,736.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,325.56 : 39,090 = 15,751.12 : x
  2. Step 2: Convert to fraction form
    28,325.56/39,090 = 15,751.12/x
  3. Step 3: Cross multiply
    28,325.56x = 39,090 × 15,751.12
  4. Step 4: Simplify right side
    28,325.56x = 615,711,280.80
  5. Step 5: Solve for x
    x = 615,711,280.80/28,325.56
  6. Step 6: Final answer
    x = 21,736.95

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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.