Home / 20,421,028.40-28,181,025.06-11,128,601.07

Finding the Fourth Proportional to 20,421,028.40, 28,181,025.06 and 11,128,601.07

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Solution

The fourth proportional to 20,421,028.40, 28,181,025.06 and 11,128,601.07 is: 15,357,472.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,028.40 : 28,181,025.06 = 11,128,601.07 : x
  2. Step 2: Convert to fraction form
    20,421,028.40/28,181,025.06 = 11,128,601.07/x
  3. Step 3: Cross multiply
    20,421,028.40x = 28,181,025.06 × 11,128,601.07
  4. Step 4: Simplify right side
    20,421,028.40x = 313,615,385,594,680.56
  5. Step 5: Solve for x
    x = 313,615,385,594,680.56/20,421,028.40
  6. Step 6: Final answer
    x = 15,357,472.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.