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Finding the Fourth Proportional to 15,616.14, 21,549.74 and 8,903.93

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Solution

The fourth proportional to 15,616.14, 21,549.74 and 8,903.93 is: 12,287.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,616.14 : 21,549.74 = 8,903.93 : x
  2. Step 2: Convert to fraction form
    15,616.14/21,549.74 = 8,903.93/x
  3. Step 3: Cross multiply
    15,616.14x = 21,549.74 × 8,903.93
  4. Step 4: Simplify right side
    15,616.14x = 191,877,224.21
  5. Step 5: Solve for x
    x = 191,877,224.21/15,616.14
  6. Step 6: Final answer
    x = 12,287.11

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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.