Home / 15,445.98-21,317.14-8,642.47

Finding the Fourth Proportional to 15,445.98, 21,317.14 and 8,642.47

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Solution

The fourth proportional to 15,445.98, 21,317.14 and 8,642.47 is: 11,927.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.98 : 21,317.14 = 8,642.47 : x
  2. Step 2: Convert to fraction form
    15,445.98/21,317.14 = 8,642.47/x
  3. Step 3: Cross multiply
    15,445.98x = 21,317.14 × 8,642.47
  4. Step 4: Simplify right side
    15,445.98x = 184,232,742.94
  5. Step 5: Solve for x
    x = 184,232,742.94/15,445.98
  6. Step 6: Final answer
    x = 11,927.55

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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.