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Finding the Fourth Proportional to 15,866.76, 21,900.48 and 9,894.84

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Solution

The fourth proportional to 15,866.76, 21,900.48 and 9,894.84 is: 13,657.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.76 : 21,900.48 = 9,894.84 : x
  2. Step 2: Convert to fraction form
    15,866.76/21,900.48 = 9,894.84/x
  3. Step 3: Cross multiply
    15,866.76x = 21,900.48 × 9,894.84
  4. Step 4: Simplify right side
    15,866.76x = 216,701,745.52
  5. Step 5: Solve for x
    x = 216,701,745.52/15,866.76
  6. Step 6: Final answer
    x = 13,657.59

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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.