Home / 20,765.91-28,656.05-11,812.35

Finding the Fourth Proportional to 20,765.91, 28,656.05 and 11,812.35

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Solution

The fourth proportional to 20,765.91, 28,656.05 and 11,812.35 is: 16,300.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.91 : 28,656.05 = 11,812.35 : x
  2. Step 2: Convert to fraction form
    20,765.91/28,656.05 = 11,812.35/x
  3. Step 3: Cross multiply
    20,765.91x = 28,656.05 × 11,812.35
  4. Step 4: Simplify right side
    20,765.91x = 338,495,233.16
  5. Step 5: Solve for x
    x = 338,495,233.16/20,765.91
  6. Step 6: Final answer
    x = 16,300.52

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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.