Home / 21,045.80-28,984.14-20,586.54

Finding the Fourth Proportional to 21,045.80, 28,984.14 and 20,586.54

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Solution

The fourth proportional to 21,045.80, 28,984.14 and 20,586.54 is: 28,351.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.80 : 28,984.14 = 20,586.54 : x
  2. Step 2: Convert to fraction form
    21,045.80/28,984.14 = 20,586.54/x
  3. Step 3: Cross multiply
    21,045.80x = 28,984.14 × 20,586.54
  4. Step 4: Simplify right side
    21,045.80x = 596,683,157.48
  5. Step 5: Solve for x
    x = 596,683,157.48/21,045.80
  6. Step 6: Final answer
    x = 28,351.65

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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.