Home / 7,485.72-10,330.60-4,128.92

Finding the Fourth Proportional to 7,485.72, 10,330.60 and 4,128.92

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Solution

The fourth proportional to 7,485.72, 10,330.60 and 4,128.92 is: 5,698.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.72 : 10,330.60 = 4,128.92 : x
  2. Step 2: Convert to fraction form
    7,485.72/10,330.60 = 4,128.92/x
  3. Step 3: Cross multiply
    7,485.72x = 10,330.60 × 4,128.92
  4. Step 4: Simplify right side
    7,485.72x = 42,654,220.95
  5. Step 5: Solve for x
    x = 42,654,220.95/7,485.72
  6. Step 6: Final answer
    x = 5,698.08

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Half scale
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Double scale
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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.