Home / 12,172.40-16,798.04-7,139.60

Finding the Fourth Proportional to 12,172.40, 16,798.04 and 7,139.60

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Solution

The fourth proportional to 12,172.40, 16,798.04 and 7,139.60 is: 9,852.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.40 : 16,798.04 = 7,139.60 : x
  2. Step 2: Convert to fraction form
    12,172.40/16,798.04 = 7,139.60/x
  3. Step 3: Cross multiply
    12,172.40x = 16,798.04 × 7,139.60
  4. Step 4: Simplify right side
    12,172.40x = 119,931,286.38
  5. Step 5: Solve for x
    x = 119,931,286.38/12,172.40
  6. Step 6: Final answer
    x = 9,852.72

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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.