Home / 18,113.12-25,045.44-15,780.32

Finding the Fourth Proportional to 18,113.12, 25,045.44 and 15,780.32

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Solution

The fourth proportional to 18,113.12, 25,045.44 and 15,780.32 is: 21,819.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,113.12 : 25,045.44 = 15,780.32 : x
  2. Step 2: Convert to fraction form
    18,113.12/25,045.44 = 15,780.32/x
  3. Step 3: Cross multiply
    18,113.12x = 25,045.44 × 15,780.32
  4. Step 4: Simplify right side
    18,113.12x = 395,225,057.74
  5. Step 5: Solve for x
    x = 395,225,057.74/18,113.12
  6. Step 6: Final answer
    x = 21,819.82

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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.