Home / 20,421,029.12-28,181,026.04-11,128,601.74

Finding the Fourth Proportional to 20,421,029.12, 28,181,026.04 and 11,128,601.74

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Solution

The fourth proportional to 20,421,029.12, 28,181,026.04 and 11,128,601.74 is: 15,357,473.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,029.12 : 28,181,026.04 = 11,128,601.74 : x
  2. Step 2: Convert to fraction form
    20,421,029.12/28,181,026.04 = 11,128,601.74/x
  3. Step 3: Cross multiply
    20,421,029.12x = 28,181,026.04 × 11,128,601.74
  4. Step 4: Simplify right side
    20,421,029.12x = 313,615,415,423,729.31
  5. Step 5: Solve for x
    x = 313,615,415,423,729.31/20,421,029.12
  6. Step 6: Final answer
    x = 15,357,473.59

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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.