Home / 20,507.49-28,303.50-12,442.47

Finding the Fourth Proportional to 20,507.49, 28,303.50 and 12,442.47

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Solution

The fourth proportional to 20,507.49, 28,303.50 and 12,442.47 is: 17,172.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.49 : 28,303.50 = 12,442.47 : x
  2. Step 2: Convert to fraction form
    20,507.49/28,303.50 = 12,442.47/x
  3. Step 3: Cross multiply
    20,507.49x = 28,303.50 × 12,442.47
  4. Step 4: Simplify right side
    20,507.49x = 352,165,449.65
  5. Step 5: Solve for x
    x = 352,165,449.65/20,507.49
  6. Step 6: Final answer
    x = 17,172.53

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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.