Home / 19,840.21-29,760.93-9,979.89

Finding the Fourth Proportional to 19,840.21, 29,760.93 and 9,979.89

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Solution

The fourth proportional to 19,840.21, 29,760.93 and 9,979.89 is: 14,970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,840.21 : 29,760.93 = 9,979.89 : x
  2. Step 2: Convert to fraction form
    19,840.21/29,760.93 = 9,979.89/x
  3. Step 3: Cross multiply
    19,840.21x = 29,760.93 × 9,979.89
  4. Step 4: Simplify right side
    19,840.21x = 297,010,807.70
  5. Step 5: Solve for x
    x = 297,010,807.70/19,840.21
  6. Step 6: Final answer
    x = 14,970.14

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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.