Home / 12,119.90-18,172.40-4,715.74

Finding the Fourth Proportional to 12,119.90, 18,172.40 and 4,715.74

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Solution

The fourth proportional to 12,119.90, 18,172.40 and 4,715.74 is: 7,070.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.90 : 18,172.40 = 4,715.74 : x
  2. Step 2: Convert to fraction form
    12,119.90/18,172.40 = 4,715.74/x
  3. Step 3: Cross multiply
    12,119.90x = 18,172.40 × 4,715.74
  4. Step 4: Simplify right side
    12,119.90x = 85,696,222.71
  5. Step 5: Solve for x
    x = 85,696,222.71/12,119.90
  6. Step 6: Final answer
    x = 7,070.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.