Home / 15,389.90-21,239.79-8,675.66

Finding the Fourth Proportional to 15,389.90, 21,239.79 and 8,675.66

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Solution

The fourth proportional to 15,389.90, 21,239.79 and 8,675.66 is: 11,973.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.90 : 21,239.79 = 8,675.66 : x
  2. Step 2: Convert to fraction form
    15,389.90/21,239.79 = 8,675.66/x
  3. Step 3: Cross multiply
    15,389.90x = 21,239.79 × 8,675.66
  4. Step 4: Simplify right side
    15,389.90x = 184,269,196.51
  5. Step 5: Solve for x
    x = 184,269,196.51/15,389.90
  6. Step 6: Final answer
    x = 11,973.38

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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.