Home / 27,981.54-38,605.80-15,880.02

Finding the Fourth Proportional to 27,981.54, 38,605.80 and 15,880.02

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Solution

The fourth proportional to 27,981.54, 38,605.80 and 15,880.02 is: 21,909.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.54 : 38,605.80 = 15,880.02 : x
  2. Step 2: Convert to fraction form
    27,981.54/38,605.80 = 15,880.02/x
  3. Step 3: Cross multiply
    27,981.54x = 38,605.80 × 15,880.02
  4. Step 4: Simplify right side
    27,981.54x = 613,060,876.12
  5. Step 5: Solve for x
    x = 613,060,876.12/27,981.54
  6. Step 6: Final answer
    x = 21,909.48

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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.