Home / 18,726.20-25,821.16-15,312.60

Finding the Fourth Proportional to 18,726.20, 25,821.16 and 15,312.60

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Solution

The fourth proportional to 18,726.20, 25,821.16 and 15,312.60 is: 21,114.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.20 : 25,821.16 = 15,312.60 : x
  2. Step 2: Convert to fraction form
    18,726.20/25,821.16 = 15,312.60/x
  3. Step 3: Cross multiply
    18,726.20x = 25,821.16 × 15,312.60
  4. Step 4: Simplify right side
    18,726.20x = 395,389,094.62
  5. Step 5: Solve for x
    x = 395,389,094.62/18,726.20
  6. Step 6: Final answer
    x = 21,114.22

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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.