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Finding the Fourth Proportional to 18,509.88, 25,538.58 and 10,549.20

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Solution

The fourth proportional to 18,509.88, 25,538.58 and 10,549.20 is: 14,555.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.88 : 25,538.58 = 10,549.20 : x
  2. Step 2: Convert to fraction form
    18,509.88/25,538.58 = 10,549.20/x
  3. Step 3: Cross multiply
    18,509.88x = 25,538.58 × 10,549.20
  4. Step 4: Simplify right side
    18,509.88x = 269,411,588.14
  5. Step 5: Solve for x
    x = 269,411,588.14/18,509.88
  6. Step 6: Final answer
    x = 14,555.02

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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.