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Finding the Fourth Proportional to 15,903.72, 21,947.16 and 8,830.50

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Solution

The fourth proportional to 15,903.72, 21,947.16 and 8,830.50 is: 12,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903.72 : 21,947.16 = 8,830.50 : x
  2. Step 2: Convert to fraction form
    15,903.72/21,947.16 = 8,830.50/x
  3. Step 3: Cross multiply
    15,903.72x = 21,947.16 × 8,830.50
  4. Step 4: Simplify right side
    15,903.72x = 193,804,396.38
  5. Step 5: Solve for x
    x = 193,804,396.38/15,903.72
  6. Step 6: Final answer
    x = 12,186.10

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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.