Home / 28,154.72-38,854.32-15,580.64

Finding the Fourth Proportional to 28,154.72, 38,854.32 and 15,580.64

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Solution

The fourth proportional to 28,154.72, 38,854.32 and 15,580.64 is: 21,501.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.72 : 38,854.32 = 15,580.64 : x
  2. Step 2: Convert to fraction form
    28,154.72/38,854.32 = 15,580.64/x
  3. Step 3: Cross multiply
    28,154.72x = 38,854.32 × 15,580.64
  4. Step 4: Simplify right side
    28,154.72x = 605,375,172.36
  5. Step 5: Solve for x
    x = 605,375,172.36/28,154.72
  6. Step 6: Final answer
    x = 21,501.73

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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.