Home / 18,756.90-28,142.64-18,475.34

Finding the Fourth Proportional to 18,756.90, 28,142.64 and 18,475.34

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Solution

The fourth proportional to 18,756.90, 28,142.64 and 18,475.34 is: 27,720.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.90 : 28,142.64 = 18,475.34 : x
  2. Step 2: Convert to fraction form
    18,756.90/28,142.64 = 18,475.34/x
  3. Step 3: Cross multiply
    18,756.90x = 28,142.64 × 18,475.34
  4. Step 4: Simplify right side
    18,756.90x = 519,944,701.78
  5. Step 5: Solve for x
    x = 519,944,701.78/18,756.90
  6. Step 6: Final answer
    x = 27,720.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.