Home / 18,670.20-25,719.76-15,686.16

Finding the Fourth Proportional to 18,670.20, 25,719.76 and 15,686.16

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Solution

The fourth proportional to 18,670.20, 25,719.76 and 15,686.16 is: 21,609.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,670.20 : 25,719.76 = 15,686.16 : x
  2. Step 2: Convert to fraction form
    18,670.20/25,719.76 = 15,686.16/x
  3. Step 3: Cross multiply
    18,670.20x = 25,719.76 × 15,686.16
  4. Step 4: Simplify right side
    18,670.20x = 403,444,270.52
  5. Step 5: Solve for x
    x = 403,444,270.52/18,670.20
  6. Step 6: Final answer
    x = 21,609.00

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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.