Home / 28,154.88-38,854.08-15,580.80

Finding the Fourth Proportional to 28,154.88, 38,854.08 and 15,580.80

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Solution

The fourth proportional to 28,154.88, 38,854.08 and 15,580.80 is: 21,501.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.88 : 38,854.08 = 15,580.80 : x
  2. Step 2: Convert to fraction form
    28,154.88/38,854.08 = 15,580.80/x
  3. Step 3: Cross multiply
    28,154.88x = 38,854.08 × 15,580.80
  4. Step 4: Simplify right side
    28,154.88x = 605,377,649.66
  5. Step 5: Solve for x
    x = 605,377,649.66/28,154.88
  6. Step 6: Final answer
    x = 21,501.70

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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.