Home / 15,463.81-21,339.99-8,390.22

Finding the Fourth Proportional to 15,463.81, 21,339.99 and 8,390.22

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Solution

The fourth proportional to 15,463.81, 21,339.99 and 8,390.22 is: 11,578.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,463.81 : 21,339.99 = 8,390.22 : x
  2. Step 2: Convert to fraction form
    15,463.81/21,339.99 = 8,390.22/x
  3. Step 3: Cross multiply
    15,463.81x = 21,339.99 × 8,390.22
  4. Step 4: Simplify right side
    15,463.81x = 179,047,130.87
  5. Step 5: Solve for x
    x = 179,047,130.87/15,463.81
  6. Step 6: Final answer
    x = 11,578.46

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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.