Home / 13,219.95-18,238.50-8,440.07

Finding the Fourth Proportional to 13,219.95, 18,238.50 and 8,440.07

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Solution

The fourth proportional to 13,219.95, 18,238.50 and 8,440.07 is: 11,644.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.95 : 18,238.50 = 8,440.07 : x
  2. Step 2: Convert to fraction form
    13,219.95/18,238.50 = 8,440.07/x
  3. Step 3: Cross multiply
    13,219.95x = 18,238.50 × 8,440.07
  4. Step 4: Simplify right side
    13,219.95x = 153,934,262.29
  5. Step 5: Solve for x
    x = 153,934,262.29/13,219.95
  6. Step 6: Final answer
    x = 11,644.09

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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.