Home / 20,316.91-28,040.33-12,357.59

Finding the Fourth Proportional to 20,316.91, 28,040.33 and 12,357.59

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Solution

The fourth proportional to 20,316.91, 28,040.33 and 12,357.59 is: 17,055.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,316.91 : 28,040.33 = 12,357.59 : x
  2. Step 2: Convert to fraction form
    20,316.91/28,040.33 = 12,357.59/x
  3. Step 3: Cross multiply
    20,316.91x = 28,040.33 × 12,357.59
  4. Step 4: Simplify right side
    20,316.91x = 346,510,909.92
  5. Step 5: Solve for x
    x = 346,510,909.92/20,316.91
  6. Step 6: Final answer
    x = 17,055.30

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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.