Home / 13,140.84-18,134.04-7,172.64

Finding the Fourth Proportional to 13,140.84, 18,134.04 and 7,172.64

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Solution

The fourth proportional to 13,140.84, 18,134.04 and 7,172.64 is: 9,898.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.84 : 18,134.04 = 7,172.64 : x
  2. Step 2: Convert to fraction form
    13,140.84/18,134.04 = 7,172.64/x
  3. Step 3: Cross multiply
    13,140.84x = 18,134.04 × 7,172.64
  4. Step 4: Simplify right side
    13,140.84x = 130,068,940.67
  5. Step 5: Solve for x
    x = 130,068,940.67/13,140.84
  6. Step 6: Final answer
    x = 9,898.07

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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.