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Finding the Third Proportional to 9,918,990 and 15,320,428

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Solution

The third proportional to 9,918,990 and 15,320,428 is: 23,663,247.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918,990 : 15,320,428 = 15,320,428 : x
  2. Step 2: Convert to fraction form
    9,918,990/15,320,428 = 15,320,428/x
  3. Step 3: Cross multiply
    9,918,990x = 15,320,428 × 15,320,428
  4. Step 4: Simplify right side
    9,918,990x = 234,715,514,103,184
  5. Step 5: Solve for x
    x = 234,715,514,103,184/9,918,990
  6. Step 6: Final answer
    x = 23,663,247.38

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.