Home / 20,804,785.60-31,207,178.40-12,742,628.80

Finding the Fourth Proportional to 20,804,785.60, 31,207,178.40 and 12,742,628.80

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Solution

The fourth proportional to 20,804,785.60, 31,207,178.40 and 12,742,628.80 is: 19,113,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804,785.60 : 31,207,178.40 = 12,742,628.80 : x
  2. Step 2: Convert to fraction form
    20,804,785.60/31,207,178.40 = 12,742,628.80/x
  3. Step 3: Cross multiply
    20,804,785.60x = 31,207,178.40 × 12,742,628.80
  4. Step 4: Simplify right side
    20,804,785.60x = 397,661,490,246,577.94
  5. Step 5: Solve for x
    x = 397,661,490,246,577.94/20,804,785.60
  6. Step 6: Final answer
    x = 19,113,943.20

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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.