Home / 20,319.40-28,052.88-12,772.12

Finding the Fourth Proportional to 20,319.40, 28,052.88 and 12,772.12

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Solution

The fourth proportional to 20,319.40, 28,052.88 and 12,772.12 is: 17,633.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.40 : 28,052.88 = 12,772.12 : x
  2. Step 2: Convert to fraction form
    20,319.40/28,052.88 = 12,772.12/x
  3. Step 3: Cross multiply
    20,319.40x = 28,052.88 × 12,772.12
  4. Step 4: Simplify right side
    20,319.40x = 358,294,749.71
  5. Step 5: Solve for x
    x = 358,294,749.71/20,319.40
  6. Step 6: Final answer
    x = 17,633.14

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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.