Home / 9,938.80-14,890.20-7,872.40

Finding the Fourth Proportional to 9,938.80, 14,890.20 and 7,872.40

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Solution

The fourth proportional to 9,938.80, 14,890.20 and 7,872.40 is: 11,794.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,938.80 : 14,890.20 = 7,872.40 : x
  2. Step 2: Convert to fraction form
    9,938.80/14,890.20 = 7,872.40/x
  3. Step 3: Cross multiply
    9,938.80x = 14,890.20 × 7,872.40
  4. Step 4: Simplify right side
    9,938.80x = 117,221,610.48
  5. Step 5: Solve for x
    x = 117,221,610.48/9,938.80
  6. Step 6: Final answer
    x = 11,794.34

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1.5x scale

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.