Home / 20,293.10-27,986.34-12,740.13

Finding the Fourth Proportional to 20,293.10, 27,986.34 and 12,740.13

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Solution

The fourth proportional to 20,293.10, 27,986.34 and 12,740.13 is: 17,569.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,293.10 : 27,986.34 = 12,740.13 : x
  2. Step 2: Convert to fraction form
    20,293.10/27,986.34 = 12,740.13/x
  3. Step 3: Cross multiply
    20,293.10x = 27,986.34 × 12,740.13
  4. Step 4: Simplify right side
    20,293.10x = 356,549,609.82
  5. Step 5: Solve for x
    x = 356,549,609.82/20,293.10
  6. Step 6: Final answer
    x = 17,569.99

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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.