Home / 21,406.20-32,269.74-19,978.98

Finding the Fourth Proportional to 21,406.20, 32,269.74 and 19,978.98

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Solution

The fourth proportional to 21,406.20, 32,269.74 and 19,978.98 is: 30,118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.20 : 32,269.74 = 19,978.98 : x
  2. Step 2: Convert to fraction form
    21,406.20/32,269.74 = 19,978.98/x
  3. Step 3: Cross multiply
    21,406.20x = 32,269.74 × 19,978.98
  4. Step 4: Simplify right side
    21,406.20x = 644,716,490.07
  5. Step 5: Solve for x
    x = 644,716,490.07/21,406.20
  6. Step 6: Final answer
    x = 30,118.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.