Home / 8,045,978.40-12,068,967.60-7,989,991.20

Finding the Fourth Proportional to 8,045,978.40, 12,068,967.60 and 7,989,991.20

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Solution

The fourth proportional to 8,045,978.40, 12,068,967.60 and 7,989,991.20 is: 11,984,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,045,978.40 : 12,068,967.60 = 7,989,991.20 : x
  2. Step 2: Convert to fraction form
    8,045,978.40/12,068,967.60 = 7,989,991.20/x
  3. Step 3: Cross multiply
    8,045,978.40x = 12,068,967.60 × 7,989,991.20
  4. Step 4: Simplify right side
    8,045,978.40x = 96,430,944,917,085.12
  5. Step 5: Solve for x
    x = 96,430,944,917,085.12/8,045,978.40
  6. Step 6: Final answer
    x = 11,984,986.80

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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.