Home / 28,315.50-39,017.76-21,903.13

Finding the Fourth Proportional to 28,315.50, 39,017.76 and 21,903.13

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Solution

The fourth proportional to 28,315.50, 39,017.76 and 21,903.13 is: 30,181.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.50 : 39,017.76 = 21,903.13 : x
  2. Step 2: Convert to fraction form
    28,315.50/39,017.76 = 21,903.13/x
  3. Step 3: Cross multiply
    28,315.50x = 39,017.76 × 21,903.13
  4. Step 4: Simplify right side
    28,315.50x = 854,611,118.36
  5. Step 5: Solve for x
    x = 854,611,118.36/28,315.50
  6. Step 6: Final answer
    x = 30,181.75

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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.