Home / 7,913.40-10,915.82-4,929.72

Finding the Fourth Proportional to 7,913.40, 10,915.82 and 4,929.72

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Solution

The fourth proportional to 7,913.40, 10,915.82 and 4,929.72 is: 6,800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.40 : 10,915.82 = 4,929.72 : x
  2. Step 2: Convert to fraction form
    7,913.40/10,915.82 = 4,929.72/x
  3. Step 3: Cross multiply
    7,913.40x = 10,915.82 × 4,929.72
  4. Step 4: Simplify right side
    7,913.40x = 53,811,936.17
  5. Step 5: Solve for x
    x = 53,811,936.17/7,913.40
  6. Step 6: Final answer
    x = 6,800.10

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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.