Home / 20,319.16-28,037.76-13,255.12

Finding the Fourth Proportional to 20,319.16, 28,037.76 and 13,255.12

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Solution

The fourth proportional to 20,319.16, 28,037.76 and 13,255.12 is: 18,290.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.16 : 28,037.76 = 13,255.12 : x
  2. Step 2: Convert to fraction form
    20,319.16/28,037.76 = 13,255.12/x
  3. Step 3: Cross multiply
    20,319.16x = 28,037.76 × 13,255.12
  4. Step 4: Simplify right side
    20,319.16x = 371,643,873.33
  5. Step 5: Solve for x
    x = 371,643,873.33/20,319.16
  6. Step 6: Final answer
    x = 18,290.32

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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.