Home / 21,669.78-32,478.08-12,317.63

Finding the Fourth Proportional to 21,669.78, 32,478.08 and 12,317.63

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Solution

The fourth proportional to 21,669.78, 32,478.08 and 12,317.63 is: 18,461.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.78 : 32,478.08 = 12,317.63 : x
  2. Step 2: Convert to fraction form
    21,669.78/32,478.08 = 12,317.63/x
  3. Step 3: Cross multiply
    21,669.78x = 32,478.08 × 12,317.63
  4. Step 4: Simplify right side
    21,669.78x = 400,052,748.57
  5. Step 5: Solve for x
    x = 400,052,748.57/21,669.78
  6. Step 6: Final answer
    x = 18,461.32

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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.