Home / 6,916.90-10,372.28-1,985.40

Finding the Fourth Proportional to 6,916.90, 10,372.28 and 1,985.40

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Solution

The fourth proportional to 6,916.90, 10,372.28 and 1,985.40 is: 2,977.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,916.90 : 10,372.28 = 1,985.40 : x
  2. Step 2: Convert to fraction form
    6,916.90/10,372.28 = 1,985.40/x
  3. Step 3: Cross multiply
    6,916.90x = 10,372.28 × 1,985.40
  4. Step 4: Simplify right side
    6,916.90x = 20,593,124.71
  5. Step 5: Solve for x
    x = 20,593,124.71/6,916.90
  6. Step 6: Final answer
    x = 2,977.22

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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.