Home / 19,985.10-29,977.65-5,193.90

Finding the Fourth Proportional to 19,985.10, 29,977.65 and 5,193.90

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Solution

The fourth proportional to 19,985.10, 29,977.65 and 5,193.90 is: 7,790.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,985.10 : 29,977.65 = 5,193.90 : x
  2. Step 2: Convert to fraction form
    19,985.10/29,977.65 = 5,193.90/x
  3. Step 3: Cross multiply
    19,985.10x = 29,977.65 × 5,193.90
  4. Step 4: Simplify right side
    19,985.10x = 155,700,916.34
  5. Step 5: Solve for x
    x = 155,700,916.34/19,985.10
  6. Step 6: Final answer
    x = 7,790.85

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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.