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Finding the Fourth Proportional to 21,666.60, 32,510.70 and 12,313.80

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Solution

The fourth proportional to 21,666.60, 32,510.70 and 12,313.80 is: 18,476.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.60 : 32,510.70 = 12,313.80 : x
  2. Step 2: Convert to fraction form
    21,666.60/32,510.70 = 12,313.80/x
  3. Step 3: Cross multiply
    21,666.60x = 32,510.70 × 12,313.80
  4. Step 4: Simplify right side
    21,666.60x = 400,330,257.66
  5. Step 5: Solve for x
    x = 400,330,257.66/21,666.60
  6. Step 6: Final answer
    x = 18,476.84

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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.