Home / 7,870.29-11,802.39-2,938.87

Finding the Fourth Proportional to 7,870.29, 11,802.39 and 2,938.87

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Solution

The fourth proportional to 7,870.29, 11,802.39 and 2,938.87 is: 4,407.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.29 : 11,802.39 = 2,938.87 : x
  2. Step 2: Convert to fraction form
    7,870.29/11,802.39 = 2,938.87/x
  3. Step 3: Cross multiply
    7,870.29x = 11,802.39 × 2,938.87
  4. Step 4: Simplify right side
    7,870.29x = 34,685,689.90
  5. Step 5: Solve for x
    x = 34,685,689.90/7,870.29
  6. Step 6: Final answer
    x = 4,407.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.