Home / 21,069,378.20-31,609,972.20-10,287,030.80

Finding the Fourth Proportional to 21,069,378.20, 31,609,972.20 and 10,287,030.80

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Solution

The fourth proportional to 21,069,378.20, 31,609,972.20 and 10,287,030.80 is: 15,433,429.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069,378.20 : 31,609,972.20 = 10,287,030.80 : x
  2. Step 2: Convert to fraction form
    21,069,378.20/31,609,972.20 = 10,287,030.80/x
  3. Step 3: Cross multiply
    21,069,378.20x = 31,609,972.20 × 10,287,030.80
  4. Step 4: Simplify right side
    21,069,378.20x = 325,172,757,608,543.75
  5. Step 5: Solve for x
    x = 325,172,757,608,543.75/21,069,378.20
  6. Step 6: Final answer
    x = 15,433,429.24

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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.