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Finding the Fourth Proportional to 15,847.95, 21,870.49 and 8,774.63

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Solution

The fourth proportional to 15,847.95, 21,870.49 and 8,774.63 is: 12,109.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.95 : 21,870.49 = 8,774.63 : x
  2. Step 2: Convert to fraction form
    15,847.95/21,870.49 = 8,774.63/x
  3. Step 3: Cross multiply
    15,847.95x = 21,870.49 × 8,774.63
  4. Step 4: Simplify right side
    15,847.95x = 191,905,348.32
  5. Step 5: Solve for x
    x = 191,905,348.32/15,847.95
  6. Step 6: Final answer
    x = 12,109.16

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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.