Home / 20,898,133.80-31,347,200.70-18,666,081.60

Finding the Fourth Proportional to 20,898,133.80, 31,347,200.70 and 18,666,081.60

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Solution

The fourth proportional to 20,898,133.80, 31,347,200.70 and 18,666,081.60 is: 27,999,122.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898,133.80 : 31,347,200.70 = 18,666,081.60 : x
  2. Step 2: Convert to fraction form
    20,898,133.80/31,347,200.70 = 18,666,081.60/x
  3. Step 3: Cross multiply
    20,898,133.80x = 31,347,200.70 × 18,666,081.60
  4. Step 4: Simplify right side
    20,898,133.80x = 585,129,406,197,777.12
  5. Step 5: Solve for x
    x = 585,129,406,197,777.12/20,898,133.80
  6. Step 6: Final answer
    x = 27,999,122.40

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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.