Home / 18,987.40-28,478.60-4,948.45

Finding the Fourth Proportional to 18,987.40, 28,478.60 and 4,948.45

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Solution

The fourth proportional to 18,987.40, 28,478.60 and 4,948.45 is: 7,422.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.40 : 28,478.60 = 4,948.45 : x
  2. Step 2: Convert to fraction form
    18,987.40/28,478.60 = 4,948.45/x
  3. Step 3: Cross multiply
    18,987.40x = 28,478.60 × 4,948.45
  4. Step 4: Simplify right side
    18,987.40x = 140,924,928.17
  5. Step 5: Solve for x
    x = 140,924,928.17/18,987.40
  6. Step 6: Final answer
    x = 7,422.02

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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.