Home / 19,868.72-29,785.76-9,999.68

Finding the Fourth Proportional to 19,868.72, 29,785.76 and 9,999.68

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Solution

The fourth proportional to 19,868.72, 29,785.76 and 9,999.68 is: 14,990.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,868.72 : 29,785.76 = 9,999.68 : x
  2. Step 2: Convert to fraction form
    19,868.72/29,785.76 = 9,999.68/x
  3. Step 3: Cross multiply
    19,868.72x = 29,785.76 × 9,999.68
  4. Step 4: Simplify right side
    19,868.72x = 297,848,068.56
  5. Step 5: Solve for x
    x = 297,848,068.56/19,868.72
  6. Step 6: Final answer
    x = 14,990.80

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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.