Home / 21,126,742.20-31,662,119.70-18,719,292.60

Finding the Fourth Proportional to 21,126,742.20, 31,662,119.70 and 18,719,292.60

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Solution

The fourth proportional to 21,126,742.20, 31,662,119.70 and 18,719,292.60 is: 28,054,135.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126,742.20 : 31,662,119.70 = 18,719,292.60 : x
  2. Step 2: Convert to fraction form
    21,126,742.20/31,662,119.70 = 18,719,292.60/x
  3. Step 3: Cross multiply
    21,126,742.20x = 31,662,119.70 × 18,719,292.60
  4. Step 4: Simplify right side
    21,126,742.20x = 592,692,483,000,524.25
  5. Step 5: Solve for x
    x = 592,692,483,000,524.25/21,126,742.20
  6. Step 6: Final answer
    x = 28,054,135.25

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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.