Home / 19,990.18-27,575.40-12,437.74

Finding the Fourth Proportional to 19,990.18, 27,575.40 and 12,437.74

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Solution

The fourth proportional to 19,990.18, 27,575.40 and 12,437.74 is: 17,157.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.18 : 27,575.40 = 12,437.74 : x
  2. Step 2: Convert to fraction form
    19,990.18/27,575.40 = 12,437.74/x
  3. Step 3: Cross multiply
    19,990.18x = 27,575.40 × 12,437.74
  4. Step 4: Simplify right side
    19,990.18x = 342,975,655.60
  5. Step 5: Solve for x
    x = 342,975,655.60/19,990.18
  6. Step 6: Final answer
    x = 17,157.21

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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.