Home / 21,121,378.47-29,142,506.57-11,954,020.95

Finding the Fourth Proportional to 21,121,378.47, 29,142,506.57 and 11,954,020.95

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Solution

The fourth proportional to 21,121,378.47, 29,142,506.57 and 11,954,020.95 is: 16,493,721.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121,378.47 : 29,142,506.57 = 11,954,020.95 : x
  2. Step 2: Convert to fraction form
    21,121,378.47/29,142,506.57 = 11,954,020.95/x
  3. Step 3: Cross multiply
    21,121,378.47x = 29,142,506.57 × 11,954,020.95
  4. Step 4: Simplify right side
    21,121,378.47x = 348,370,134,013,522.50
  5. Step 5: Solve for x
    x = 348,370,134,013,522.50/21,121,378.47
  6. Step 6: Final answer
    x = 16,493,721.49

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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.