Home / 20,488.31-30,740.09-8,645.16

Finding the Fourth Proportional to 20,488.31, 30,740.09 and 8,645.16

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Solution

The fourth proportional to 20,488.31, 30,740.09 and 8,645.16 is: 12,970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.31 : 30,740.09 = 8,645.16 : x
  2. Step 2: Convert to fraction form
    20,488.31/30,740.09 = 8,645.16/x
  3. Step 3: Cross multiply
    20,488.31x = 30,740.09 × 8,645.16
  4. Step 4: Simplify right side
    20,488.31x = 265,752,953.24
  5. Step 5: Solve for x
    x = 265,752,953.24/20,488.31
  6. Step 6: Final answer
    x = 12,970.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.