Home / 21,399.40-32,012.70-18,509.80

Finding the Fourth Proportional to 21,399.40, 32,012.70 and 18,509.80

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Solution

The fourth proportional to 21,399.40, 32,012.70 and 18,509.80 is: 27,689.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.40 : 32,012.70 = 18,509.80 : x
  2. Step 2: Convert to fraction form
    21,399.40/32,012.70 = 18,509.80/x
  3. Step 3: Cross multiply
    21,399.40x = 32,012.70 × 18,509.80
  4. Step 4: Simplify right side
    21,399.40x = 592,548,674.46
  5. Step 5: Solve for x
    x = 592,548,674.46/21,399.40
  6. Step 6: Final answer
    x = 27,689.97

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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.