Home / 19,977.40-29,979.48-8,290.63

Finding the Fourth Proportional to 19,977.40, 29,979.48 and 8,290.63

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Solution

The fourth proportional to 19,977.40, 29,979.48 and 8,290.63 is: 12,441.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.40 : 29,979.48 = 8,290.63 : x
  2. Step 2: Convert to fraction form
    19,977.40/29,979.48 = 8,290.63/x
  3. Step 3: Cross multiply
    19,977.40x = 29,979.48 × 8,290.63
  4. Step 4: Simplify right side
    19,977.40x = 248,548,776.27
  5. Step 5: Solve for x
    x = 248,548,776.27/19,977.40
  6. Step 6: Final answer
    x = 12,441.50

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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.