Home / 21,538,085.80-32,307,128.70-20,687,780.20

Finding the Fourth Proportional to 21,538,085.80, 32,307,128.70 and 20,687,780.20

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Solution

The fourth proportional to 21,538,085.80, 32,307,128.70 and 20,687,780.20 is: 31,031,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538,085.80 : 32,307,128.70 = 20,687,780.20 : x
  2. Step 2: Convert to fraction form
    21,538,085.80/32,307,128.70 = 20,687,780.20/x
  3. Step 3: Cross multiply
    21,538,085.80x = 32,307,128.70 × 20,687,780.20
  4. Step 4: Simplify right side
    21,538,085.80x = 668,362,777,438,711.75
  5. Step 5: Solve for x
    x = 668,362,777,438,711.75/21,538,085.80
  6. Step 6: Final answer
    x = 31,031,670.30

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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.