Home / 38,485.04-57,621-20,915.12

Finding the Fourth Proportional to 38,485.04, 57,621 and 20,915.12

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Solution

The fourth proportional to 38,485.04, 57,621 and 20,915.12 is: 31,314.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,485.04 : 57,621 = 20,915.12 : x
  2. Step 2: Convert to fraction form
    38,485.04/57,621 = 20,915.12/x
  3. Step 3: Cross multiply
    38,485.04x = 57,621 × 20,915.12
  4. Step 4: Simplify right side
    38,485.04x = 1,205,150,129.52
  5. Step 5: Solve for x
    x = 1,205,150,129.52/38,485.04
  6. Step 6: Final answer
    x = 31,314.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.