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Finding the Fourth Proportional to 21,739.59, 32,609.88 and 12,312.25

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Solution

The fourth proportional to 21,739.59, 32,609.88 and 12,312.25 is: 18,468.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.59 : 32,609.88 = 12,312.25 : x
  2. Step 2: Convert to fraction form
    21,739.59/32,609.88 = 12,312.25/x
  3. Step 3: Cross multiply
    21,739.59x = 32,609.88 × 12,312.25
  4. Step 4: Simplify right side
    21,739.59x = 401,500,913.51
  5. Step 5: Solve for x
    x = 401,500,913.51/21,739.59
  6. Step 6: Final answer
    x = 18,468.65

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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.