Home / 19,990.70-29,969.85-8,312.66

Finding the Fourth Proportional to 19,990.70, 29,969.85 and 8,312.66

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Solution

The fourth proportional to 19,990.70, 29,969.85 and 8,312.66 is: 12,462.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.70 : 29,969.85 = 8,312.66 : x
  2. Step 2: Convert to fraction form
    19,990.70/29,969.85 = 8,312.66/x
  3. Step 3: Cross multiply
    19,990.70x = 29,969.85 × 8,312.66
  4. Step 4: Simplify right side
    19,990.70x = 249,129,279.40
  5. Step 5: Solve for x
    x = 249,129,279.40/19,990.70
  6. Step 6: Final answer
    x = 12,462.26

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1.5x scale

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.