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Finding the Fourth Proportional to 15,018,139.90, 21,073,225.55 and 15,018,139.90

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Solution

The fourth proportional to 15,018,139.90, 21,073,225.55 and 15,018,139.90 is: 21,073,225.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018,139.90 : 21,073,225.55 = 15,018,139.90 : x
  2. Step 2: Convert to fraction form
    15,018,139.90/21,073,225.55 = 15,018,139.90/x
  3. Step 3: Cross multiply
    15,018,139.90x = 21,073,225.55 × 15,018,139.90
  4. Step 4: Simplify right side
    15,018,139.90x = 316,480,649,454,154.44
  5. Step 5: Solve for x
    x = 316,480,649,454,154.44/15,018,139.90
  6. Step 6: Final answer
    x = 21,073,225.55

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.