Home / 30,969,131.76-42,739,795.80-18,579,689.28

Finding the Fourth Proportional to 30,969,131.76, 42,739,795.80 and 18,579,689.28

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Solution

The fourth proportional to 30,969,131.76, 42,739,795.80 and 18,579,689.28 is: 25,641,407.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969,131.76 : 42,739,795.80 = 18,579,689.28 : x
  2. Step 2: Convert to fraction form
    30,969,131.76/42,739,795.80 = 18,579,689.28/x
  3. Step 3: Cross multiply
    30,969,131.76x = 42,739,795.80 × 18,579,689.28
  4. Step 4: Simplify right side
    30,969,131.76x = 794,092,125,854,649
  5. Step 5: Solve for x
    x = 794,092,125,854,649/30,969,131.76
  6. Step 6: Final answer
    x = 25,641,407.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.