Home / 13,487.40-18,606.78-9,288.36

Finding the Fourth Proportional to 13,487.40, 18,606.78 and 9,288.36

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Solution

The fourth proportional to 13,487.40, 18,606.78 and 9,288.36 is: 12,813.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.40 : 18,606.78 = 9,288.36 : x
  2. Step 2: Convert to fraction form
    13,487.40/18,606.78 = 9,288.36/x
  3. Step 3: Cross multiply
    13,487.40x = 18,606.78 × 9,288.36
  4. Step 4: Simplify right side
    13,487.40x = 172,826,471.08
  5. Step 5: Solve for x
    x = 172,826,471.08/13,487.40
  6. Step 6: Final answer
    x = 12,813.92

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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.