Home / 20,386.66-28,133.87-12,319.19

Finding the Fourth Proportional to 20,386.66, 28,133.87 and 12,319.19

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Solution

The fourth proportional to 20,386.66, 28,133.87 and 12,319.19 is: 17,000.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.66 : 28,133.87 = 12,319.19 : x
  2. Step 2: Convert to fraction form
    20,386.66/28,133.87 = 12,319.19/x
  3. Step 3: Cross multiply
    20,386.66x = 28,133.87 × 12,319.19
  4. Step 4: Simplify right side
    20,386.66x = 346,586,489.97
  5. Step 5: Solve for x
    x = 346,586,489.97/20,386.66
  6. Step 6: Final answer
    x = 17,000.65

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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.