Home / 28,167.04-38,838.72-21,070.72

Finding the Fourth Proportional to 28,167.04, 38,838.72 and 21,070.72

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Solution

The fourth proportional to 28,167.04, 38,838.72 and 21,070.72 is: 29,053.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,167.04 : 38,838.72 = 21,070.72 : x
  2. Step 2: Convert to fraction form
    28,167.04/38,838.72 = 21,070.72/x
  3. Step 3: Cross multiply
    28,167.04x = 38,838.72 × 21,070.72
  4. Step 4: Simplify right side
    28,167.04x = 818,359,794.28
  5. Step 5: Solve for x
    x = 818,359,794.28/28,167.04
  6. Step 6: Final answer
    x = 29,053.81

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Half scale
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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.