Home / 18,668.16-25,755.52-12,387.20

Finding the Fourth Proportional to 18,668.16, 25,755.52 and 12,387.20

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Solution

The fourth proportional to 18,668.16, 25,755.52 and 12,387.20 is: 17,090.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.16 : 25,755.52 = 12,387.20 : x
  2. Step 2: Convert to fraction form
    18,668.16/25,755.52 = 12,387.20/x
  3. Step 3: Cross multiply
    18,668.16x = 25,755.52 × 12,387.20
  4. Step 4: Simplify right side
    18,668.16x = 319,038,777.34
  5. Step 5: Solve for x
    x = 319,038,777.34/18,668.16
  6. Step 6: Final answer
    x = 17,090.00

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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.