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Finding the Fourth Proportional to 15,111.66, 20,866.71 and 12,606.92

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Solution

The fourth proportional to 15,111.66, 20,866.71 and 12,606.92 is: 17,408.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.66 : 20,866.71 = 12,606.92 : x
  2. Step 2: Convert to fraction form
    15,111.66/20,866.71 = 12,606.92/x
  3. Step 3: Cross multiply
    15,111.66x = 20,866.71 × 12,606.92
  4. Step 4: Simplify right side
    15,111.66x = 263,064,943.63
  5. Step 5: Solve for x
    x = 263,064,943.63/15,111.66
  6. Step 6: Final answer
    x = 17,408.08

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1.5x scale

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.