Home / 21,756.16-30,008.14-18,517.70

Finding the Fourth Proportional to 21,756.16, 30,008.14 and 18,517.70

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Solution

The fourth proportional to 21,756.16, 30,008.14 and 18,517.70 is: 25,541.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.16 : 30,008.14 = 18,517.70 : x
  2. Step 2: Convert to fraction form
    21,756.16/30,008.14 = 18,517.70/x
  3. Step 3: Cross multiply
    21,756.16x = 30,008.14 × 18,517.70
  4. Step 4: Simplify right side
    21,756.16x = 555,681,762.80
  5. Step 5: Solve for x
    x = 555,681,762.80/21,756.16
  6. Step 6: Final answer
    x = 25,541.36

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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.