Home / 20,698,728.60-31,104,080.10-18,235,291.80

Finding the Fourth Proportional to 20,698,728.60, 31,104,080.10 and 18,235,291.80

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Solution

The fourth proportional to 20,698,728.60, 31,104,080.10 and 18,235,291.80 is: 27,402,261.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698,728.60 : 31,104,080.10 = 18,235,291.80 : x
  2. Step 2: Convert to fraction form
    20,698,728.60/31,104,080.10 = 18,235,291.80/x
  3. Step 3: Cross multiply
    20,698,728.60x = 31,104,080.10 × 18,235,291.80
  4. Step 4: Simplify right side
    20,698,728.60x = 567,191,976,794,073.25
  5. Step 5: Solve for x
    x = 567,191,976,794,073.25/20,698,728.60
  6. Step 6: Final answer
    x = 27,402,261.64

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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.