Home / 28,455.05-39,268.59-15,708.20

Finding the Fourth Proportional to 28,455.05, 39,268.59 and 15,708.20

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Solution

The fourth proportional to 28,455.05, 39,268.59 and 15,708.20 is: 21,677.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.05 : 39,268.59 = 15,708.20 : x
  2. Step 2: Convert to fraction form
    28,455.05/39,268.59 = 15,708.20/x
  3. Step 3: Cross multiply
    28,455.05x = 39,268.59 × 15,708.20
  4. Step 4: Simplify right side
    28,455.05x = 616,838,886.30
  5. Step 5: Solve for x
    x = 616,838,886.30/28,455.05
  6. Step 6: Final answer
    x = 21,677.66

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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.