Home / 10,515,999.80-15,773,999.70-8,720,910.20

Finding the Fourth Proportional to 10,515,999.80, 15,773,999.70 and 8,720,910.20

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Solution

The fourth proportional to 10,515,999.80, 15,773,999.70 and 8,720,910.20 is: 13,081,365.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515,999.80 : 15,773,999.70 = 8,720,910.20 : x
  2. Step 2: Convert to fraction form
    10,515,999.80/15,773,999.70 = 8,720,910.20/x
  3. Step 3: Cross multiply
    10,515,999.80x = 15,773,999.70 × 8,720,910.20
  4. Step 4: Simplify right side
    10,515,999.80x = 137,563,634,878,526.92
  5. Step 5: Solve for x
    x = 137,563,634,878,526.92/10,515,999.80
  6. Step 6: Final answer
    x = 13,081,365.30

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1.5x scale

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.