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Finding the Fourth Proportional to 15,866.55, 21,897.14 and 8,795.25

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Solution

The fourth proportional to 15,866.55, 21,897.14 and 8,795.25 is: 12,138.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.55 : 21,897.14 = 8,795.25 : x
  2. Step 2: Convert to fraction form
    15,866.55/21,897.14 = 8,795.25/x
  3. Step 3: Cross multiply
    15,866.55x = 21,897.14 × 8,795.25
  4. Step 4: Simplify right side
    15,866.55x = 192,590,776.61
  5. Step 5: Solve for x
    x = 192,590,776.61/15,866.55
  6. Step 6: Final answer
    x = 12,138.16

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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.