Home / 9,931.50-13,705.20-5,455.20

Finding the Fourth Proportional to 9,931.50, 13,705.20 and 5,455.20

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Solution

The fourth proportional to 9,931.50, 13,705.20 and 5,455.20 is: 7,528.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,931.50 : 13,705.20 = 5,455.20 : x
  2. Step 2: Convert to fraction form
    9,931.50/13,705.20 = 5,455.20/x
  3. Step 3: Cross multiply
    9,931.50x = 13,705.20 × 5,455.20
  4. Step 4: Simplify right side
    9,931.50x = 74,764,607.04
  5. Step 5: Solve for x
    x = 74,764,607.04/9,931.50
  6. Step 6: Final answer
    x = 7,528.03

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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.