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Finding the Fourth Proportional to 28,038.78, 42,051.68 and 8,312.58

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Solution

The fourth proportional to 28,038.78, 42,051.68 and 8,312.58 is: 12,466.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,038.78 : 42,051.68 = 8,312.58 : x
  2. Step 2: Convert to fraction form
    28,038.78/42,051.68 = 8,312.58/x
  3. Step 3: Cross multiply
    28,038.78x = 42,051.68 × 8,312.58
  4. Step 4: Simplify right side
    28,038.78x = 349,557,954.13
  5. Step 5: Solve for x
    x = 349,557,954.13/28,038.78
  6. Step 6: Final answer
    x = 12,466.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.