Home / 28,391.62-42,387.80-21,693.06

Finding the Fourth Proportional to 28,391.62, 42,387.80 and 21,693.06

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Solution

The fourth proportional to 28,391.62, 42,387.80 and 21,693.06 is: 32,387.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,391.62 : 42,387.80 = 21,693.06 : x
  2. Step 2: Convert to fraction form
    28,391.62/42,387.80 = 21,693.06/x
  3. Step 3: Cross multiply
    28,391.62x = 42,387.80 × 21,693.06
  4. Step 4: Simplify right side
    28,391.62x = 919,521,088.67
  5. Step 5: Solve for x
    x = 919,521,088.67/28,391.62
  6. Step 6: Final answer
    x = 32,387.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.