Home / 21,001,029.60-31,438,558.80-12,476,978.40

Finding the Fourth Proportional to 21,001,029.60, 31,438,558.80 and 12,476,978.40

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Solution

The fourth proportional to 21,001,029.60, 31,438,558.80 and 12,476,978.40 is: 18,678,047.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001,029.60 : 31,438,558.80 = 12,476,978.40 : x
  2. Step 2: Convert to fraction form
    21,001,029.60/31,438,558.80 = 12,476,978.40/x
  3. Step 3: Cross multiply
    21,001,029.60x = 31,438,558.80 × 12,476,978.40
  4. Step 4: Simplify right side
    21,001,029.60x = 392,258,219,074,729.94
  5. Step 5: Solve for x
    x = 392,258,219,074,729.94/21,001,029.60
  6. Step 6: Final answer
    x = 18,678,047.06

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1.5x scale

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.