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Finding the Fourth Proportional to 26,307, 36,304.74 and 15,129

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Solution

The fourth proportional to 26,307, 36,304.74 and 15,129 is: 20,878.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,307 : 36,304.74 = 15,129 : x
  2. Step 2: Convert to fraction form
    26,307/36,304.74 = 15,129/x
  3. Step 3: Cross multiply
    26,307x = 36,304.74 × 15,129
  4. Step 4: Simplify right side
    26,307x = 549,254,411.46
  5. Step 5: Solve for x
    x = 549,254,411.46/26,307
  6. Step 6: Final answer
    x = 20,878.64

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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.