Home / 15,307.05-21,123.19-9,348.69

Finding the Fourth Proportional to 15,307.05, 21,123.19 and 9,348.69

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Solution

The fourth proportional to 15,307.05, 21,123.19 and 9,348.69 is: 12,900.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,307.05 : 21,123.19 = 9,348.69 : x
  2. Step 2: Convert to fraction form
    15,307.05/21,123.19 = 9,348.69/x
  3. Step 3: Cross multiply
    15,307.05x = 21,123.19 × 9,348.69
  4. Step 4: Simplify right side
    15,307.05x = 197,474,155.12
  5. Step 5: Solve for x
    x = 197,474,155.12/15,307.05
  6. Step 6: Final answer
    x = 12,900.86

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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.