Home / 28,890.18-39,868.74-16,315.20

Finding the Fourth Proportional to 28,890.18, 39,868.74 and 16,315.20

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Solution

The fourth proportional to 28,890.18, 39,868.74 and 16,315.20 is: 22,515.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.18 : 39,868.74 = 16,315.20 : x
  2. Step 2: Convert to fraction form
    28,890.18/39,868.74 = 16,315.20/x
  3. Step 3: Cross multiply
    28,890.18x = 39,868.74 × 16,315.20
  4. Step 4: Simplify right side
    28,890.18x = 650,466,466.85
  5. Step 5: Solve for x
    x = 650,466,466.85/28,890.18
  6. Step 6: Final answer
    x = 22,515.14

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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.