Home / 20,709,851.40-31,029,347.70-13,127,959.80

Finding the Fourth Proportional to 20,709,851.40, 31,029,347.70 and 13,127,959.80

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Solution

The fourth proportional to 20,709,851.40, 31,029,347.70 and 13,127,959.80 is: 19,669,481.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709,851.40 : 31,029,347.70 = 13,127,959.80 : x
  2. Step 2: Convert to fraction form
    20,709,851.40/31,029,347.70 = 13,127,959.80/x
  3. Step 3: Cross multiply
    20,709,851.40x = 31,029,347.70 × 13,127,959.80
  4. Step 4: Simplify right side
    20,709,851.40x = 407,352,029,225,822.50
  5. Step 5: Solve for x
    x = 407,352,029,225,822.50/20,709,851.40
  6. Step 6: Final answer
    x = 19,669,481.03

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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.