Home / 21,153.64-29,114.34-18,135.58

Finding the Fourth Proportional to 21,153.64, 29,114.34 and 18,135.58

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Solution

The fourth proportional to 21,153.64, 29,114.34 and 18,135.58 is: 24,960.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.64 : 29,114.34 = 18,135.58 : x
  2. Step 2: Convert to fraction form
    21,153.64/29,114.34 = 18,135.58/x
  3. Step 3: Cross multiply
    21,153.64x = 29,114.34 × 18,135.58
  4. Step 4: Simplify right side
    21,153.64x = 528,005,442.22
  5. Step 5: Solve for x
    x = 528,005,442.22/21,153.64
  6. Step 6: Final answer
    x = 24,960.50

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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.