Home / 15,491.72-21,378.51-9,118.26

Finding the Fourth Proportional to 15,491.72, 21,378.51 and 9,118.26

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Solution

The fourth proportional to 15,491.72, 21,378.51 and 9,118.26 is: 12,583.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.72 : 21,378.51 = 9,118.26 : x
  2. Step 2: Convert to fraction form
    15,491.72/21,378.51 = 9,118.26/x
  3. Step 3: Cross multiply
    15,491.72x = 21,378.51 × 9,118.26
  4. Step 4: Simplify right side
    15,491.72x = 194,934,812.59
  5. Step 5: Solve for x
    x = 194,934,812.59/15,491.72
  6. Step 6: Final answer
    x = 12,583.16

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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.