Home / 15,485.20-21,369.60-8,411.52

Finding the Fourth Proportional to 15,485.20, 21,369.60 and 8,411.52

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Solution

The fourth proportional to 15,485.20, 21,369.60 and 8,411.52 is: 11,607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.20 : 21,369.60 = 8,411.52 : x
  2. Step 2: Convert to fraction form
    15,485.20/21,369.60 = 8,411.52/x
  3. Step 3: Cross multiply
    15,485.20x = 21,369.60 × 8,411.52
  4. Step 4: Simplify right side
    15,485.20x = 179,750,817.79
  5. Step 5: Solve for x
    x = 179,750,817.79/15,485.20
  6. Step 6: Final answer
    x = 11,607.91

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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.