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Finding the Fourth Proportional to 28,038.28, 42,050.93 and 8,312.08

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Solution

The fourth proportional to 28,038.28, 42,050.93 and 8,312.08 is: 12,466.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,038.28 : 42,050.93 = 8,312.08 : x
  2. Step 2: Convert to fraction form
    28,038.28/42,050.93 = 8,312.08/x
  3. Step 3: Cross multiply
    28,038.28x = 42,050.93 × 8,312.08
  4. Step 4: Simplify right side
    28,038.28x = 349,530,609.89
  5. Step 5: Solve for x
    x = 349,530,609.89/28,038.28
  6. Step 6: Final answer
    x = 12,466.19

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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.