Home / 19,979.93-29,973.53-9,989.89

Finding the Fourth Proportional to 19,979.93, 29,973.53 and 9,989.89

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Solution

The fourth proportional to 19,979.93, 29,973.53 and 9,989.89 is: 14,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,979.93 : 29,973.53 = 9,989.89 : x
  2. Step 2: Convert to fraction form
    19,979.93/29,973.53 = 9,989.89/x
  3. Step 3: Cross multiply
    19,979.93x = 29,973.53 × 9,989.89
  4. Step 4: Simplify right side
    19,979.93x = 299,432,267.61
  5. Step 5: Solve for x
    x = 299,432,267.61/19,979.93
  6. Step 6: Final answer
    x = 14,986.65

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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.