Home / 9,915.99-13,684.06-5,439.77

Finding the Fourth Proportional to 9,915.99, 13,684.06 and 5,439.77

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Solution

The fourth proportional to 9,915.99, 13,684.06 and 5,439.77 is: 7,506.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.99 : 13,684.06 = 5,439.77 : x
  2. Step 2: Convert to fraction form
    9,915.99/13,684.06 = 5,439.77/x
  3. Step 3: Cross multiply
    9,915.99x = 13,684.06 × 5,439.77
  4. Step 4: Simplify right side
    9,915.99x = 74,438,139.07
  5. Step 5: Solve for x
    x = 74,438,139.07/9,915.99
  6. Step 6: Final answer
    x = 7,506.88

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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.