Home / 20,651.28-28,507.32-13,490.10

Finding the Fourth Proportional to 20,651.28, 28,507.32 and 13,490.10

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Solution

The fourth proportional to 20,651.28, 28,507.32 and 13,490.10 is: 18,621.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.28 : 28,507.32 = 13,490.10 : x
  2. Step 2: Convert to fraction form
    20,651.28/28,507.32 = 13,490.10/x
  3. Step 3: Cross multiply
    20,651.28x = 28,507.32 × 13,490.10
  4. Step 4: Simplify right side
    20,651.28x = 384,566,597.53
  5. Step 5: Solve for x
    x = 384,566,597.53/20,651.28
  6. Step 6: Final answer
    x = 18,621.93

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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.