Home / 15,129.16-20,867.88-9,150.52

Finding the Fourth Proportional to 15,129.16, 20,867.88 and 9,150.52

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Solution

The fourth proportional to 15,129.16, 20,867.88 and 9,150.52 is: 12,621.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.16 : 20,867.88 = 9,150.52 : x
  2. Step 2: Convert to fraction form
    15,129.16/20,867.88 = 9,150.52/x
  3. Step 3: Cross multiply
    15,129.16x = 20,867.88 × 9,150.52
  4. Step 4: Simplify right side
    15,129.16x = 190,951,953.30
  5. Step 5: Solve for x
    x = 190,951,953.30/15,129.16
  6. Step 6: Final answer
    x = 12,621.45

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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.