Home / 21,151,856.09-29,187,364.10-12,449,509.72

Finding the Fourth Proportional to 21,151,856.09, 29,187,364.10 and 12,449,509.72

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Solution

The fourth proportional to 21,151,856.09, 29,187,364.10 and 12,449,509.72 is: 17,179,030.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151,856.09 : 29,187,364.10 = 12,449,509.72 : x
  2. Step 2: Convert to fraction form
    21,151,856.09/29,187,364.10 = 12,449,509.72/x
  3. Step 3: Cross multiply
    21,151,856.09x = 29,187,364.10 × 12,449,509.72
  4. Step 4: Simplify right side
    21,151,856.09x = 363,368,372,928,913.06
  5. Step 5: Solve for x
    x = 363,368,372,928,913.06/21,151,856.09
  6. Step 6: Final answer
    x = 17,179,030.12

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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.