Home / 21,000,678.60-31,438,032.30-12,476,627.40

Finding the Fourth Proportional to 21,000,678.60, 31,438,032.30 and 12,476,627.40

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Solution

The fourth proportional to 21,000,678.60, 31,438,032.30 and 12,476,627.40 is: 18,677,520.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000,678.60 : 31,438,032.30 = 12,476,627.40 : x
  2. Step 2: Convert to fraction form
    21,000,678.60/31,438,032.30 = 12,476,627.40/x
  3. Step 3: Cross multiply
    21,000,678.60x = 31,438,032.30 × 12,476,627.40
  4. Step 4: Simplify right side
    21,000,678.60x = 392,240,615,196,265.06
  5. Step 5: Solve for x
    x = 392,240,615,196,265.06/21,000,678.60
  6. Step 6: Final answer
    x = 18,677,520.98

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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.