Home / 20,293.71-27,987.18-12,740.74

Finding the Fourth Proportional to 20,293.71, 27,987.18 and 12,740.74

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Solution

The fourth proportional to 20,293.71, 27,987.18 and 12,740.74 is: 17,570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,293.71 : 27,987.18 = 12,740.74 : x
  2. Step 2: Convert to fraction form
    20,293.71/27,987.18 = 12,740.74/x
  3. Step 3: Cross multiply
    20,293.71x = 27,987.18 × 12,740.74
  4. Step 4: Simplify right side
    20,293.71x = 356,577,459.23
  5. Step 5: Solve for x
    x = 356,577,459.23/20,293.71
  6. Step 6: Final answer
    x = 17,570.84

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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.