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Finding the Fourth Proportional to 7,155.60, 9,873.36 and 4,322.40

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Solution

The fourth proportional to 7,155.60, 9,873.36 and 4,322.40 is: 5,964.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.60 : 9,873.36 = 4,322.40 : x
  2. Step 2: Convert to fraction form
    7,155.60/9,873.36 = 4,322.40/x
  3. Step 3: Cross multiply
    7,155.60x = 9,873.36 × 4,322.40
  4. Step 4: Simplify right side
    7,155.60x = 42,676,611.26
  5. Step 5: Solve for x
    x = 42,676,611.26/7,155.60
  6. Step 6: Final answer
    x = 5,964.09

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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.