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Finding the Fourth Proportional to 12,398.79, 18,509.00 and 10,624.70

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Solution

The fourth proportional to 12,398.79, 18,509.00 and 10,624.70 is: 15,860.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.79 : 18,509.00 = 10,624.70 : x
  2. Step 2: Convert to fraction form
    12,398.79/18,509.00 = 10,624.70/x
  3. Step 3: Cross multiply
    12,398.79x = 18,509.00 × 10,624.70
  4. Step 4: Simplify right side
    12,398.79x = 196,652,426.63
  5. Step 5: Solve for x
    x = 196,652,426.63/12,398.79
  6. Step 6: Final answer
    x = 15,860.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.