Home / 12,503.35-18,759.89-12,315.63

Finding the Fourth Proportional to 12,503.35, 18,759.89 and 12,315.63

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Solution

The fourth proportional to 12,503.35, 18,759.89 and 12,315.63 is: 18,478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,503.35 : 18,759.89 = 12,315.63 : x
  2. Step 2: Convert to fraction form
    12,503.35/18,759.89 = 12,315.63/x
  3. Step 3: Cross multiply
    12,503.35x = 18,759.89 × 12,315.63
  4. Step 4: Simplify right side
    12,503.35x = 231,039,864.08
  5. Step 5: Solve for x
    x = 231,039,864.08/12,503.35
  6. Step 6: Final answer
    x = 18,478.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.