Home / 12,918,969.17-17,828,167.71-7,117,750.91

Finding the Fourth Proportional to 12,918,969.17, 17,828,167.71 and 7,117,750.91

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Solution

The fourth proportional to 12,918,969.17, 17,828,167.71 and 7,117,750.91 is: 9,822,490.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918,969.17 : 17,828,167.71 = 7,117,750.91 : x
  2. Step 2: Convert to fraction form
    12,918,969.17/17,828,167.71 = 7,117,750.91/x
  3. Step 3: Cross multiply
    12,918,969.17x = 17,828,167.71 × 7,117,750.91
  4. Step 4: Simplify right side
    12,918,969.17x = 126,896,456,980,198.78
  5. Step 5: Solve for x
    x = 126,896,456,980,198.78/12,918,969.17
  6. Step 6: Final answer
    x = 9,822,490.89

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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.