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Finding the Fourth Proportional to 18,447.80, 25,457.87 and 10,064.30

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Solution

The fourth proportional to 18,447.80, 25,457.87 and 10,064.30 is: 13,888.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,447.80 : 25,457.87 = 10,064.30 : x
  2. Step 2: Convert to fraction form
    18,447.80/25,457.87 = 10,064.30/x
  3. Step 3: Cross multiply
    18,447.80x = 25,457.87 × 10,064.30
  4. Step 4: Simplify right side
    18,447.80x = 256,215,538.91
  5. Step 5: Solve for x
    x = 256,215,538.91/18,447.80
  6. Step 6: Final answer
    x = 13,888.68

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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.