Home / 15,421-23,129.78-4,328.12

Finding the Fourth Proportional to 15,421, 23,129.78 and 4,328.12

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Solution

The fourth proportional to 15,421, 23,129.78 and 4,328.12 is: 6,491.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421 : 23,129.78 = 4,328.12 : x
  2. Step 2: Convert to fraction form
    15,421/23,129.78 = 4,328.12/x
  3. Step 3: Cross multiply
    15,421x = 23,129.78 × 4,328.12
  4. Step 4: Simplify right side
    15,421x = 100,108,463.41
  5. Step 5: Solve for x
    x = 100,108,463.41/15,421
  6. Step 6: Final answer
    x = 6,491.70

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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.