Home / 28,169.04-38,841.48-21,072.72

Finding the Fourth Proportional to 28,169.04, 38,841.48 and 21,072.72

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Solution

The fourth proportional to 28,169.04, 38,841.48 and 21,072.72 is: 29,056.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,169.04 : 38,841.48 = 21,072.72 : x
  2. Step 2: Convert to fraction form
    28,169.04/38,841.48 = 21,072.72/x
  3. Step 3: Cross multiply
    28,169.04x = 38,841.48 × 21,072.72
  4. Step 4: Simplify right side
    28,169.04x = 818,495,632.43
  5. Step 5: Solve for x
    x = 818,495,632.43/28,169.04
  6. Step 6: Final answer
    x = 29,056.57

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Half scale
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Double 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.