Home / 21,915.81-30,257.67-16,870.54

Finding the Fourth Proportional to 21,915.81, 30,257.67 and 16,870.54

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Solution

The fourth proportional to 21,915.81, 30,257.67 and 16,870.54 is: 23,292.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.81 : 30,257.67 = 16,870.54 : x
  2. Step 2: Convert to fraction form
    21,915.81/30,257.67 = 16,870.54/x
  3. Step 3: Cross multiply
    21,915.81x = 30,257.67 × 16,870.54
  4. Step 4: Simplify right side
    21,915.81x = 510,463,232.04
  5. Step 5: Solve for x
    x = 510,463,232.04/21,915.81
  6. Step 6: Final answer
    x = 23,292.01

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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.