Home / 15,120.38-20,866.21-8,746.85

Finding the Fourth Proportional to 15,120.38, 20,866.21 and 8,746.85

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Solution

The fourth proportional to 15,120.38, 20,866.21 and 8,746.85 is: 12,070.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.38 : 20,866.21 = 8,746.85 : x
  2. Step 2: Convert to fraction form
    15,120.38/20,866.21 = 8,746.85/x
  3. Step 3: Cross multiply
    15,120.38x = 20,866.21 × 8,746.85
  4. Step 4: Simplify right side
    15,120.38x = 182,513,639.24
  5. Step 5: Solve for x
    x = 182,513,639.24/15,120.38
  6. Step 6: Final answer
    x = 12,070.70

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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.