Home / 12,887.80-19,328.53-9,418.67

Finding the Fourth Proportional to 12,887.80, 19,328.53 and 9,418.67

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Solution

The fourth proportional to 12,887.80, 19,328.53 and 9,418.67 is: 14,125.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.80 : 19,328.53 = 9,418.67 : x
  2. Step 2: Convert to fraction form
    12,887.80/19,328.53 = 9,418.67/x
  3. Step 3: Cross multiply
    12,887.80x = 19,328.53 × 9,418.67
  4. Step 4: Simplify right side
    12,887.80x = 182,049,045.66
  5. Step 5: Solve for x
    x = 182,049,045.66/12,887.80
  6. Step 6: Final answer
    x = 14,125.69

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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.