Home / 7,911.28-10,905-6,230.02

Finding the Fourth Proportional to 7,911.28, 10,905 and 6,230.02

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Solution

The fourth proportional to 7,911.28, 10,905 and 6,230.02 is: 8,587.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.28 : 10,905 = 6,230.02 : x
  2. Step 2: Convert to fraction form
    7,911.28/10,905 = 6,230.02/x
  3. Step 3: Cross multiply
    7,911.28x = 10,905 × 6,230.02
  4. Step 4: Simplify right side
    7,911.28x = 67,938,368.10
  5. Step 5: Solve for x
    x = 67,938,368.10/7,911.28
  6. Step 6: Final answer
    x = 8,587.53

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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.