Home / 7,212.10-10,818.15-3,931.60

Finding the Fourth Proportional to 7,212.10, 10,818.15 and 3,931.60

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Solution

The fourth proportional to 7,212.10, 10,818.15 and 3,931.60 is: 5,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.10 : 10,818.15 = 3,931.60 : x
  2. Step 2: Convert to fraction form
    7,212.10/10,818.15 = 3,931.60/x
  3. Step 3: Cross multiply
    7,212.10x = 10,818.15 × 3,931.60
  4. Step 4: Simplify right side
    7,212.10x = 42,532,638.54
  5. Step 5: Solve for x
    x = 42,532,638.54/7,212.10
  6. Step 6: Final answer
    x = 5,897.40

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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.