Home / 20,523.45-28,332.78-12,977.52

Finding the Fourth Proportional to 20,523.45, 28,332.78 and 12,977.52

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Solution

The fourth proportional to 20,523.45, 28,332.78 and 12,977.52 is: 17,915.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.45 : 28,332.78 = 12,977.52 : x
  2. Step 2: Convert to fraction form
    20,523.45/28,332.78 = 12,977.52/x
  3. Step 3: Cross multiply
    20,523.45x = 28,332.78 × 12,977.52
  4. Step 4: Simplify right side
    20,523.45x = 367,689,219.11
  5. Step 5: Solve for x
    x = 367,689,219.11/20,523.45
  6. Step 6: Final answer
    x = 17,915.57

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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.