Home / 11,421.41-15,764.88-6,642.47

Finding the Fourth Proportional to 11,421.41, 15,764.88 and 6,642.47

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Solution

The fourth proportional to 11,421.41, 15,764.88 and 6,642.47 is: 9,168.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.41 : 15,764.88 = 6,642.47 : x
  2. Step 2: Convert to fraction form
    11,421.41/15,764.88 = 6,642.47/x
  3. Step 3: Cross multiply
    11,421.41x = 15,764.88 × 6,642.47
  4. Step 4: Simplify right side
    11,421.41x = 104,717,663.63
  5. Step 5: Solve for x
    x = 104,717,663.63/11,421.41
  6. Step 6: Final answer
    x = 9,168.54

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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.