Home / 7,915.40-10,923.30-4,378.74

Finding the Fourth Proportional to 7,915.40, 10,923.30 and 4,378.74

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Solution

The fourth proportional to 7,915.40, 10,923.30 and 4,378.74 is: 6,042.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.40 : 10,923.30 = 4,378.74 : x
  2. Step 2: Convert to fraction form
    7,915.40/10,923.30 = 4,378.74/x
  3. Step 3: Cross multiply
    7,915.40x = 10,923.30 × 4,378.74
  4. Step 4: Simplify right side
    7,915.40x = 47,830,290.64
  5. Step 5: Solve for x
    x = 47,830,290.64/7,915.40
  6. Step 6: Final answer
    x = 6,042.69

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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.