Home / 15,462.90-21,338.64-8,389.35

Finding the Fourth Proportional to 15,462.90, 21,338.64 and 8,389.35

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Solution

The fourth proportional to 15,462.90, 21,338.64 and 8,389.35 is: 11,577.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,462.90 : 21,338.64 = 8,389.35 : x
  2. Step 2: Convert to fraction form
    15,462.90/21,338.64 = 8,389.35/x
  3. Step 3: Cross multiply
    15,462.90x = 21,338.64 × 8,389.35
  4. Step 4: Simplify right side
    15,462.90x = 179,017,319.48
  5. Step 5: Solve for x
    x = 179,017,319.48/15,462.90
  6. Step 6: Final answer
    x = 11,577.22

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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.