Home / 30,586.55-42,164.75-21,618.23

Finding the Fourth Proportional to 30,586.55, 42,164.75 and 21,618.23

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Solution

The fourth proportional to 30,586.55, 42,164.75 and 21,618.23 is: 29,801.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,586.55 : 42,164.75 = 21,618.23 : x
  2. Step 2: Convert to fraction form
    30,586.55/42,164.75 = 21,618.23/x
  3. Step 3: Cross multiply
    30,586.55x = 42,164.75 × 21,618.23
  4. Step 4: Simplify right side
    30,586.55x = 911,527,106.61
  5. Step 5: Solve for x
    x = 911,527,106.61/30,586.55
  6. Step 6: Final answer
    x = 29,801.57

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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.