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Finding the Fourth Proportional to 15,711,726.80, 21,679,648.80 and 8,835,798.80

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Solution

The fourth proportional to 15,711,726.80, 21,679,648.80 and 8,835,798.80 is: 12,191,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711,726.80 : 21,679,648.80 = 8,835,798.80 : x
  2. Step 2: Convert to fraction form
    15,711,726.80/21,679,648.80 = 8,835,798.80/x
  3. Step 3: Cross multiply
    15,711,726.80x = 21,679,648.80 × 8,835,798.80
  4. Step 4: Simplify right side
    15,711,726.80x = 191,557,014,851,461.47
  5. Step 5: Solve for x
    x = 191,557,014,851,461.47/15,711,726.80
  6. Step 6: Final answer
    x = 12,191,977.20

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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.