Home / 10,915.09-15,064.63-6,439.94

Finding the Fourth Proportional to 10,915.09, 15,064.63 and 6,439.94

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Solution

The fourth proportional to 10,915.09, 15,064.63 and 6,439.94 is: 8,888.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.09 : 15,064.63 = 6,439.94 : x
  2. Step 2: Convert to fraction form
    10,915.09/15,064.63 = 6,439.94/x
  3. Step 3: Cross multiply
    10,915.09x = 15,064.63 × 6,439.94
  4. Step 4: Simplify right side
    10,915.09x = 97,015,313.32
  5. Step 5: Solve for x
    x = 97,015,313.32/10,915.09
  6. Step 6: Final answer
    x = 8,888.18

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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.