Home / 28,154.86-38,854.88-15,579.61

Finding the Fourth Proportional to 28,154.86, 38,854.88 and 15,579.61

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Solution

The fourth proportional to 28,154.86, 38,854.88 and 15,579.61 is: 21,500.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.86 : 38,854.88 = 15,579.61 : x
  2. Step 2: Convert to fraction form
    28,154.86/38,854.88 = 15,579.61/x
  3. Step 3: Cross multiply
    28,154.86x = 38,854.88 × 15,579.61
  4. Step 4: Simplify right side
    28,154.86x = 605,343,877.00
  5. Step 5: Solve for x
    x = 605,343,877.00/28,154.86
  6. Step 6: Final answer
    x = 21,500.51

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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.