Home / 15,488.91-21,374.73-8,415.32

Finding the Fourth Proportional to 15,488.91, 21,374.73 and 8,415.32

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Solution

The fourth proportional to 15,488.91, 21,374.73 and 8,415.32 is: 11,613.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,488.91 : 21,374.73 = 8,415.32 : x
  2. Step 2: Convert to fraction form
    15,488.91/21,374.73 = 8,415.32/x
  3. Step 3: Cross multiply
    15,488.91x = 21,374.73 × 8,415.32
  4. Step 4: Simplify right side
    15,488.91x = 179,875,085.99
  5. Step 5: Solve for x
    x = 179,875,085.99/15,488.91
  6. Step 6: Final answer
    x = 11,613.15

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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.