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Finding the Fourth Proportional to 15,549, 21,457.60 and 8,475.42

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Solution

The fourth proportional to 15,549, 21,457.60 and 8,475.42 is: 11,696.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,549 : 21,457.60 = 8,475.42 : x
  2. Step 2: Convert to fraction form
    15,549/21,457.60 = 8,475.42/x
  3. Step 3: Cross multiply
    15,549x = 21,457.60 × 8,475.42
  4. Step 4: Simplify right side
    15,549x = 181,862,172.19
  5. Step 5: Solve for x
    x = 181,862,172.19/15,549
  6. Step 6: Final answer
    x = 11,696.07

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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.