Home / 10,915.80-16,364.10-9,749.40

Finding the Fourth Proportional to 10,915.80, 16,364.10 and 9,749.40

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Solution

The fourth proportional to 10,915.80, 16,364.10 and 9,749.40 is: 14,615.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.80 : 16,364.10 = 9,749.40 : x
  2. Step 2: Convert to fraction form
    10,915.80/16,364.10 = 9,749.40/x
  3. Step 3: Cross multiply
    10,915.80x = 16,364.10 × 9,749.40
  4. Step 4: Simplify right side
    10,915.80x = 159,540,156.54
  5. Step 5: Solve for x
    x = 159,540,156.54/10,915.80
  6. Step 6: Final answer
    x = 14,615.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.