Home / 15,115.28-20,838.65-12,753.32

Finding the Fourth Proportional to 15,115.28, 20,838.65 and 12,753.32

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Solution

The fourth proportional to 15,115.28, 20,838.65 and 12,753.32 is: 17,582.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.28 : 20,838.65 = 12,753.32 : x
  2. Step 2: Convert to fraction form
    15,115.28/20,838.65 = 12,753.32/x
  3. Step 3: Cross multiply
    15,115.28x = 20,838.65 × 12,753.32
  4. Step 4: Simplify right side
    15,115.28x = 265,761,803.86
  5. Step 5: Solve for x
    x = 265,761,803.86/15,115.28
  6. Step 6: Final answer
    x = 17,582.33

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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.