Home / 11,368.29-15,690.65-7,640.13

Finding the Fourth Proportional to 11,368.29, 15,690.65 and 7,640.13

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Solution

The fourth proportional to 11,368.29, 15,690.65 and 7,640.13 is: 10,545.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,368.29 : 15,690.65 = 7,640.13 : x
  2. Step 2: Convert to fraction form
    11,368.29/15,690.65 = 7,640.13/x
  3. Step 3: Cross multiply
    11,368.29x = 15,690.65 × 7,640.13
  4. Step 4: Simplify right side
    11,368.29x = 119,878,546.43
  5. Step 5: Solve for x
    x = 119,878,546.43/11,368.29
  6. Step 6: Final answer
    x = 10,545.00

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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.