Home / 7,915.10-10,921.70-4,378.30

Finding the Fourth Proportional to 7,915.10, 10,921.70 and 4,378.30

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Solution

The fourth proportional to 7,915.10, 10,921.70 and 4,378.30 is: 6,041.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.10 : 10,921.70 = 4,378.30 : x
  2. Step 2: Convert to fraction form
    7,915.10/10,921.70 = 4,378.30/x
  3. Step 3: Cross multiply
    7,915.10x = 10,921.70 × 4,378.30
  4. Step 4: Simplify right side
    7,915.10x = 47,818,462.75
  5. Step 5: Solve for x
    x = 47,818,462.75/7,915.10
  6. Step 6: Final answer
    x = 6,041.43

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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.