Home / 15,491.35-21,378.01-8,417.77

Finding the Fourth Proportional to 15,491.35, 21,378.01 and 8,417.77

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Solution

The fourth proportional to 15,491.35, 21,378.01 and 8,417.77 is: 11,616.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.35 : 21,378.01 = 8,417.77 : x
  2. Step 2: Convert to fraction form
    15,491.35/21,378.01 = 8,417.77/x
  3. Step 3: Cross multiply
    15,491.35x = 21,378.01 × 8,417.77
  4. Step 4: Simplify right side
    15,491.35x = 179,955,064.35
  5. Step 5: Solve for x
    x = 179,955,064.35/15,491.35
  6. Step 6: Final answer
    x = 11,616.49

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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.