Home / 15,129.30-20,880.24-9,159.86

Finding the Fourth Proportional to 15,129.30, 20,880.24 and 9,159.86

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Solution

The fourth proportional to 15,129.30, 20,880.24 and 9,159.86 is: 12,641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.30 : 20,880.24 = 9,159.86 : x
  2. Step 2: Convert to fraction form
    15,129.30/20,880.24 = 9,159.86/x
  3. Step 3: Cross multiply
    15,129.30x = 20,880.24 × 9,159.86
  4. Step 4: Simplify right side
    15,129.30x = 191,260,075.17
  5. Step 5: Solve for x
    x = 191,260,075.17/15,129.30
  6. Step 6: Final answer
    x = 12,641.70

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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.