Home / 20,320.83-28,042.76-11,368.34

Finding the Fourth Proportional to 20,320.83, 28,042.76 and 11,368.34

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Solution

The fourth proportional to 20,320.83, 28,042.76 and 11,368.34 is: 15,688.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.83 : 28,042.76 = 11,368.34 : x
  2. Step 2: Convert to fraction form
    20,320.83/28,042.76 = 11,368.34/x
  3. Step 3: Cross multiply
    20,320.83x = 28,042.76 × 11,368.34
  4. Step 4: Simplify right side
    20,320.83x = 318,799,433.16
  5. Step 5: Solve for x
    x = 318,799,433.16/20,320.83
  6. Step 6: Final answer
    x = 15,688.31

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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.