Home / 15,210.39-20,989.36-8,495.70

Finding the Fourth Proportional to 15,210.39, 20,989.36 and 8,495.70

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Solution

The fourth proportional to 15,210.39, 20,989.36 and 8,495.70 is: 11,723.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,210.39 : 20,989.36 = 8,495.70 : x
  2. Step 2: Convert to fraction form
    15,210.39/20,989.36 = 8,495.70/x
  3. Step 3: Cross multiply
    15,210.39x = 20,989.36 × 8,495.70
  4. Step 4: Simplify right side
    15,210.39x = 178,319,305.75
  5. Step 5: Solve for x
    x = 178,319,305.75/15,210.39
  6. Step 6: Final answer
    x = 11,723.52

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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.