Home / 12,456,721.90-18,689,748.45-4,889,118.70

Finding the Fourth Proportional to 12,456,721.90, 18,689,748.45 and 4,889,118.70

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Solution

The fourth proportional to 12,456,721.90, 18,689,748.45 and 4,889,118.70 is: 7,335,509.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456,721.90 : 18,689,748.45 = 4,889,118.70 : x
  2. Step 2: Convert to fraction form
    12,456,721.90/18,689,748.45 = 4,889,118.70/x
  3. Step 3: Cross multiply
    12,456,721.90x = 18,689,748.45 × 4,889,118.70
  4. Step 4: Simplify right side
    12,456,721.90x = 91,376,398,645,191.02
  5. Step 5: Solve for x
    x = 91,376,398,645,191.02/12,456,721.90
  6. Step 6: Final answer
    x = 7,335,509.24

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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.