Home / 10,330.80-15,485.40-5,643.60

Finding the Fourth Proportional to 10,330.80, 15,485.40 and 5,643.60

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Solution

The fourth proportional to 10,330.80, 15,485.40 and 5,643.60 is: 8,459.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,330.80 : 15,485.40 = 5,643.60 : x
  2. Step 2: Convert to fraction form
    10,330.80/15,485.40 = 5,643.60/x
  3. Step 3: Cross multiply
    10,330.80x = 15,485.40 × 5,643.60
  4. Step 4: Simplify right side
    10,330.80x = 87,393,403.44
  5. Step 5: Solve for x
    x = 87,393,403.44/10,330.80
  6. Step 6: Final answer
    x = 8,459.50

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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.