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Finding the Fourth Proportional to 18,389, 25,376.88 and 10,005.50

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Solution

The fourth proportional to 18,389, 25,376.88 and 10,005.50 is: 13,807.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,389 : 25,376.88 = 10,005.50 : x
  2. Step 2: Convert to fraction form
    18,389/25,376.88 = 10,005.50/x
  3. Step 3: Cross multiply
    18,389x = 25,376.88 × 10,005.50
  4. Step 4: Simplify right side
    18,389x = 253,908,372.84
  5. Step 5: Solve for x
    x = 253,908,372.84/18,389
  6. Step 6: Final answer
    x = 13,807.62

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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.