Home / 12,655.50-18,985.68-5,730

Finding the Fourth Proportional to 12,655.50, 18,985.68 and 5,730

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Solution

The fourth proportional to 12,655.50, 18,985.68 and 5,730 is: 8,596.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.50 : 18,985.68 = 5,730 : x
  2. Step 2: Convert to fraction form
    12,655.50/18,985.68 = 5,730/x
  3. Step 3: Cross multiply
    12,655.50x = 18,985.68 × 5,730
  4. Step 4: Simplify right side
    12,655.50x = 108,787,946.40
  5. Step 5: Solve for x
    x = 108,787,946.40/12,655.50
  6. Step 6: Final answer
    x = 8,596.10

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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.