Home / 15,125.84-20,855.58-9,818.72

Finding the Fourth Proportional to 15,125.84, 20,855.58 and 9,818.72

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Solution

The fourth proportional to 15,125.84, 20,855.58 and 9,818.72 is: 13,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.84 : 20,855.58 = 9,818.72 : x
  2. Step 2: Convert to fraction form
    15,125.84/20,855.58 = 9,818.72/x
  3. Step 3: Cross multiply
    15,125.84x = 20,855.58 × 9,818.72
  4. Step 4: Simplify right side
    15,125.84x = 204,775,100.46
  5. Step 5: Solve for x
    x = 204,775,100.46/15,125.84
  6. Step 6: Final answer
    x = 13,538.10

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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.