Home / 15,315.81-21,134.28-9,348.96

Finding the Fourth Proportional to 15,315.81, 21,134.28 and 9,348.96

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Solution

The fourth proportional to 15,315.81, 21,134.28 and 9,348.96 is: 12,900.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.81 : 21,134.28 = 9,348.96 : x
  2. Step 2: Convert to fraction form
    15,315.81/21,134.28 = 9,348.96/x
  3. Step 3: Cross multiply
    15,315.81x = 21,134.28 × 9,348.96
  4. Step 4: Simplify right side
    15,315.81x = 197,583,538.35
  5. Step 5: Solve for x
    x = 197,583,538.35/15,315.81
  6. Step 6: Final answer
    x = 12,900.63

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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.