Home / 13,707.06-18,919.29-8,938.90

Finding the Fourth Proportional to 13,707.06, 18,919.29 and 8,938.90

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Solution

The fourth proportional to 13,707.06, 18,919.29 and 8,938.90 is: 12,338.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.06 : 18,919.29 = 8,938.90 : x
  2. Step 2: Convert to fraction form
    13,707.06/18,919.29 = 8,938.90/x
  3. Step 3: Cross multiply
    13,707.06x = 18,919.29 × 8,938.90
  4. Step 4: Simplify right side
    13,707.06x = 169,117,641.38
  5. Step 5: Solve for x
    x = 169,117,641.38/13,707.06
  6. Step 6: Final answer
    x = 12,338.00

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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.