Home / 29,287.72-40,420.04-21,118.05

Finding the Fourth Proportional to 29,287.72, 40,420.04 and 21,118.05

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Solution

The fourth proportional to 29,287.72, 40,420.04 and 21,118.05 is: 29,145.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,287.72 : 40,420.04 = 21,118.05 : x
  2. Step 2: Convert to fraction form
    29,287.72/40,420.04 = 21,118.05/x
  3. Step 3: Cross multiply
    29,287.72x = 40,420.04 × 21,118.05
  4. Step 4: Simplify right side
    29,287.72x = 853,592,377.47
  5. Step 5: Solve for x
    x = 853,592,377.47/29,287.72
  6. Step 6: Final answer
    x = 29,145.06

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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.