Home / 20,385.36-28,132.08-12,317.91

Finding the Fourth Proportional to 20,385.36, 28,132.08 and 12,317.91

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Solution

The fourth proportional to 20,385.36, 28,132.08 and 12,317.91 is: 16,998.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.36 : 28,132.08 = 12,317.91 : x
  2. Step 2: Convert to fraction form
    20,385.36/28,132.08 = 12,317.91/x
  3. Step 3: Cross multiply
    20,385.36x = 28,132.08 × 12,317.91
  4. Step 4: Simplify right side
    20,385.36x = 346,528,429.55
  5. Step 5: Solve for x
    x = 346,528,429.55/20,385.36
  6. Step 6: Final answer
    x = 16,998.89

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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.