Home / 9,478.16-13,078.56-5,285.60

Finding the Fourth Proportional to 9,478.16, 13,078.56 and 5,285.60

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Solution

The fourth proportional to 9,478.16, 13,078.56 and 5,285.60 is: 7,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,478.16 : 13,078.56 = 5,285.60 : x
  2. Step 2: Convert to fraction form
    9,478.16/13,078.56 = 5,285.60/x
  3. Step 3: Cross multiply
    9,478.16x = 13,078.56 × 5,285.60
  4. Step 4: Simplify right side
    9,478.16x = 69,128,036.74
  5. Step 5: Solve for x
    x = 69,128,036.74/9,478.16
  6. Step 6: Final answer
    x = 7,293.40

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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.