Home / 21,543.21-29,732.47-12,113.60

Finding the Fourth Proportional to 21,543.21, 29,732.47 and 12,113.60

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Solution

The fourth proportional to 21,543.21, 29,732.47 and 12,113.60 is: 16,718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,543.21 : 29,732.47 = 12,113.60 : x
  2. Step 2: Convert to fraction form
    21,543.21/29,732.47 = 12,113.60/x
  3. Step 3: Cross multiply
    21,543.21x = 29,732.47 × 12,113.60
  4. Step 4: Simplify right side
    21,543.21x = 360,167,069.65
  5. Step 5: Solve for x
    x = 360,167,069.65/21,543.21
  6. Step 6: Final answer
    x = 16,718.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.