Home / 28,691.07-39,582.62-21,155.28

Finding the Fourth Proportional to 28,691.07, 39,582.62 and 21,155.28

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Solution

The fourth proportional to 28,691.07, 39,582.62 and 21,155.28 is: 29,186.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.07 : 39,582.62 = 21,155.28 : x
  2. Step 2: Convert to fraction form
    28,691.07/39,582.62 = 21,155.28/x
  3. Step 3: Cross multiply
    28,691.07x = 39,582.62 × 21,155.28
  4. Step 4: Simplify right side
    28,691.07x = 837,381,303.46
  5. Step 5: Solve for x
    x = 837,381,303.46/28,691.07
  6. Step 6: Final answer
    x = 29,186.13

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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.