Home / 7,153.28-9,871.49-4,009.40

Finding the Fourth Proportional to 7,153.28, 9,871.49 and 4,009.40

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Solution

The fourth proportional to 7,153.28, 9,871.49 and 4,009.40 is: 5,532.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,153.28 : 9,871.49 = 4,009.40 : x
  2. Step 2: Convert to fraction form
    7,153.28/9,871.49 = 4,009.40/x
  3. Step 3: Cross multiply
    7,153.28x = 9,871.49 × 4,009.40
  4. Step 4: Simplify right side
    7,153.28x = 39,578,682.60
  5. Step 5: Solve for x
    x = 39,578,682.60/7,153.28
  6. Step 6: Final answer
    x = 5,532.95

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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.