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Finding the Fourth Proportional to 12,457,521.90, 18,650,853.45 and 12,457,521.90

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Solution

The fourth proportional to 12,457,521.90, 18,650,853.45 and 12,457,521.90 is: 18,650,853.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457,521.90 : 18,650,853.45 = 12,457,521.90 : x
  2. Step 2: Convert to fraction form
    12,457,521.90/18,650,853.45 = 12,457,521.90/x
  3. Step 3: Cross multiply
    12,457,521.90x = 18,650,853.45 × 12,457,521.90
  4. Step 4: Simplify right side
    12,457,521.90x = 232,343,415,307,065.56
  5. Step 5: Solve for x
    x = 232,343,415,307,065.56/12,457,521.90
  6. Step 6: Final answer
    x = 18,650,853.45

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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.