Home / 21,715.63-29,968.14-12,155.47

Finding the Fourth Proportional to 21,715.63, 29,968.14 and 12,155.47

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Solution

The fourth proportional to 21,715.63, 29,968.14 and 12,155.47 is: 16,774.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.63 : 29,968.14 = 12,155.47 : x
  2. Step 2: Convert to fraction form
    21,715.63/29,968.14 = 12,155.47/x
  3. Step 3: Cross multiply
    21,715.63x = 29,968.14 × 12,155.47
  4. Step 4: Simplify right side
    21,715.63x = 364,276,778.76
  5. Step 5: Solve for x
    x = 364,276,778.76/21,715.63
  6. Step 6: Final answer
    x = 16,774.87

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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.