Home / 20,742,012.90-31,103,688.15-7,958,268.90

Finding the Fourth Proportional to 20,742,012.90, 31,103,688.15 and 7,958,268.90

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Solution

The fourth proportional to 20,742,012.90, 31,103,688.15 and 7,958,268.90 is: 11,933,823.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742,012.90 : 31,103,688.15 = 7,958,268.90 : x
  2. Step 2: Convert to fraction form
    20,742,012.90/31,103,688.15 = 7,958,268.90/x
  3. Step 3: Cross multiply
    20,742,012.90x = 31,103,688.15 × 7,958,268.90
  4. Step 4: Simplify right side
    20,742,012.90x = 247,531,514,079,443.53
  5. Step 5: Solve for x
    x = 247,531,514,079,443.53/20,742,012.90
  6. Step 6: Final answer
    x = 11,933,823.17

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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.