Home / 28,320.27-42,645.08-20,976.81

Finding the Fourth Proportional to 28,320.27, 42,645.08 and 20,976.81

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Solution

The fourth proportional to 28,320.27, 42,645.08 and 20,976.81 is: 31,587.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,320.27 : 42,645.08 = 20,976.81 : x
  2. Step 2: Convert to fraction form
    28,320.27/42,645.08 = 20,976.81/x
  3. Step 3: Cross multiply
    28,320.27x = 42,645.08 × 20,976.81
  4. Step 4: Simplify right side
    28,320.27x = 894,557,635.71
  5. Step 5: Solve for x
    x = 894,557,635.71/28,320.27
  6. Step 6: Final answer
    x = 31,587.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.