Home / 15,780,663.40-23,670,995.10-12,943,978.60

Finding the Fourth Proportional to 15,780,663.40, 23,670,995.10 and 12,943,978.60

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Solution

The fourth proportional to 15,780,663.40, 23,670,995.10 and 12,943,978.60 is: 19,415,967.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780,663.40 : 23,670,995.10 = 12,943,978.60 : x
  2. Step 2: Convert to fraction form
    15,780,663.40/23,670,995.10 = 12,943,978.60/x
  3. Step 3: Cross multiply
    15,780,663.40x = 23,670,995.10 × 12,943,978.60
  4. Step 4: Simplify right side
    15,780,663.40x = 306,396,854,015,104.88
  5. Step 5: Solve for x
    x = 306,396,854,015,104.88/15,780,663.40
  6. Step 6: Final answer
    x = 19,415,967.90

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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.