Home / 20,642,437.20-30,963,655.80-13,839,992.40

Finding the Fourth Proportional to 20,642,437.20, 30,963,655.80 and 13,839,992.40

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Solution

The fourth proportional to 20,642,437.20, 30,963,655.80 and 13,839,992.40 is: 20,759,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642,437.20 : 30,963,655.80 = 13,839,992.40 : x
  2. Step 2: Convert to fraction form
    20,642,437.20/30,963,655.80 = 13,839,992.40/x
  3. Step 3: Cross multiply
    20,642,437.20x = 30,963,655.80 × 13,839,992.40
  4. Step 4: Simplify right side
    20,642,437.20x = 428,536,760,948,215.94
  5. Step 5: Solve for x
    x = 428,536,760,948,215.94/20,642,437.20
  6. Step 6: Final answer
    x = 20,759,988.60

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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.