Home / 7,915.40-10,925.50-4,771.78

Finding the Fourth Proportional to 7,915.40, 10,925.50 and 4,771.78

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Solution

The fourth proportional to 7,915.40, 10,925.50 and 4,771.78 is: 6,586.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.40 : 10,925.50 = 4,771.78 : x
  2. Step 2: Convert to fraction form
    7,915.40/10,925.50 = 4,771.78/x
  3. Step 3: Cross multiply
    7,915.40x = 10,925.50 × 4,771.78
  4. Step 4: Simplify right side
    7,915.40x = 52,134,082.39
  5. Step 5: Solve for x
    x = 52,134,082.39/7,915.40
  6. Step 6: Final answer
    x = 6,586.41

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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.