Home / 21,931.04-30,265.01-12,108.60

Finding the Fourth Proportional to 21,931.04, 30,265.01 and 12,108.60

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Solution

The fourth proportional to 21,931.04, 30,265.01 and 12,108.60 is: 16,709.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.04 : 30,265.01 = 12,108.60 : x
  2. Step 2: Convert to fraction form
    21,931.04/30,265.01 = 12,108.60/x
  3. Step 3: Cross multiply
    21,931.04x = 30,265.01 × 12,108.60
  4. Step 4: Simplify right side
    21,931.04x = 366,466,900.09
  5. Step 5: Solve for x
    x = 366,466,900.09/21,931.04
  6. Step 6: Final answer
    x = 16,709.96

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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.