Home / 10,690.19-16,038.74-5,142.81

Finding the Fourth Proportional to 10,690.19, 16,038.74 and 5,142.81

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Solution

The fourth proportional to 10,690.19, 16,038.74 and 5,142.81 is: 7,715.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,690.19 : 16,038.74 = 5,142.81 : x
  2. Step 2: Convert to fraction form
    10,690.19/16,038.74 = 5,142.81/x
  3. Step 3: Cross multiply
    10,690.19x = 16,038.74 × 5,142.81
  4. Step 4: Simplify right side
    10,690.19x = 82,484,245.41
  5. Step 5: Solve for x
    x = 82,484,245.41/10,690.19
  6. Step 6: Final answer
    x = 7,715.88

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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.