Home / 21,715.64-29,968.72-12,154.94

Finding the Fourth Proportional to 21,715.64, 29,968.72 and 12,154.94

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Solution

The fourth proportional to 21,715.64, 29,968.72 and 12,154.94 is: 16,774.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.64 : 29,968.72 = 12,154.94 : x
  2. Step 2: Convert to fraction form
    21,715.64/29,968.72 = 12,154.94/x
  3. Step 3: Cross multiply
    21,715.64x = 29,968.72 × 12,154.94
  4. Step 4: Simplify right side
    21,715.64x = 364,267,993.48
  5. Step 5: Solve for x
    x = 364,267,993.48/21,715.64
  6. Step 6: Final answer
    x = 16,774.45

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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.