Home / 20,520.48-28,316.57-11,570.18

Finding the Fourth Proportional to 20,520.48, 28,316.57 and 11,570.18

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Solution

The fourth proportional to 20,520.48, 28,316.57 and 11,570.18 is: 15,965.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.48 : 28,316.57 = 11,570.18 : x
  2. Step 2: Convert to fraction form
    20,520.48/28,316.57 = 11,570.18/x
  3. Step 3: Cross multiply
    20,520.48x = 28,316.57 × 11,570.18
  4. Step 4: Simplify right side
    20,520.48x = 327,627,612.45
  5. Step 5: Solve for x
    x = 327,627,612.45/20,520.48
  6. Step 6: Final answer
    x = 15,965.88

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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.