Home / 20,319.40-28,040.58-11,366.80

Finding the Fourth Proportional to 20,319.40, 28,040.58 and 11,366.80

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Solution

The fourth proportional to 20,319.40, 28,040.58 and 11,366.80 is: 15,686.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.40 : 28,040.58 = 11,366.80 : x
  2. Step 2: Convert to fraction form
    20,319.40/28,040.58 = 11,366.80/x
  3. Step 3: Cross multiply
    20,319.40x = 28,040.58 × 11,366.80
  4. Step 4: Simplify right side
    20,319.40x = 318,731,664.74
  5. Step 5: Solve for x
    x = 318,731,664.74/20,319.40
  6. Step 6: Final answer
    x = 15,686.08

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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.