Home / 21,422.81-32,078.85-14,779.79

Finding the Fourth Proportional to 21,422.81, 32,078.85 and 14,779.79

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Solution

The fourth proportional to 21,422.81, 32,078.85 and 14,779.79 is: 22,131.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,422.81 : 32,078.85 = 14,779.79 : x
  2. Step 2: Convert to fraction form
    21,422.81/32,078.85 = 14,779.79/x
  3. Step 3: Cross multiply
    21,422.81x = 32,078.85 × 14,779.79
  4. Step 4: Simplify right side
    21,422.81x = 474,118,666.44
  5. Step 5: Solve for x
    x = 474,118,666.44/21,422.81
  6. Step 6: Final answer
    x = 22,131.49

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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.