Home / 21,005,881.90-31,490,160.45-12,477,165.10

Finding the Fourth Proportional to 21,005,881.90, 31,490,160.45 and 12,477,165.10

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Solution

The fourth proportional to 21,005,881.90, 31,490,160.45 and 12,477,165.10 is: 18,704,662.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,881.90 : 31,490,160.45 = 12,477,165.10 : x
  2. Step 2: Convert to fraction form
    21,005,881.90/31,490,160.45 = 12,477,165.10/x
  3. Step 3: Cross multiply
    21,005,881.90x = 31,490,160.45 × 12,477,165.10
  4. Step 4: Simplify right side
    21,005,881.90x = 392,907,930,960,140.25
  5. Step 5: Solve for x
    x = 392,907,930,960,140.25/21,005,881.90
  6. Step 6: Final answer
    x = 18,704,662.48

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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.