Home / 13,140.29-18,133.59-8,424.57

Finding the Fourth Proportional to 13,140.29, 18,133.59 and 8,424.57

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Solution

The fourth proportional to 13,140.29, 18,133.59 and 8,424.57 is: 11,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.29 : 18,133.59 = 8,424.57 : x
  2. Step 2: Convert to fraction form
    13,140.29/18,133.59 = 8,424.57/x
  3. Step 3: Cross multiply
    13,140.29x = 18,133.59 × 8,424.57
  4. Step 4: Simplify right side
    13,140.29x = 152,767,698.31
  5. Step 5: Solve for x
    x = 152,767,698.31/13,140.29
  6. Step 6: Final answer
    x = 11,625.90

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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.