Home / 15,590.14-21,514.39-8,420.06

Finding the Fourth Proportional to 15,590.14, 21,514.39 and 8,420.06

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Solution

The fourth proportional to 15,590.14, 21,514.39 and 8,420.06 is: 11,619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,590.14 : 21,514.39 = 8,420.06 : x
  2. Step 2: Convert to fraction form
    15,590.14/21,514.39 = 8,420.06/x
  3. Step 3: Cross multiply
    15,590.14x = 21,514.39 × 8,420.06
  4. Step 4: Simplify right side
    15,590.14x = 181,152,326.04
  5. Step 5: Solve for x
    x = 181,152,326.04/15,590.14
  6. Step 6: Final answer
    x = 11,619.67

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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.