Home / 21,123.64-29,120.58-14,400.64

Finding the Fourth Proportional to 21,123.64, 29,120.58 and 14,400.64

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Solution

The fourth proportional to 21,123.64, 29,120.58 and 14,400.64 is: 19,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.64 : 29,120.58 = 14,400.64 : x
  2. Step 2: Convert to fraction form
    21,123.64/29,120.58 = 14,400.64/x
  3. Step 3: Cross multiply
    21,123.64x = 29,120.58 × 14,400.64
  4. Step 4: Simplify right side
    21,123.64x = 419,354,989.17
  5. Step 5: Solve for x
    x = 419,354,989.17/21,123.64
  6. Step 6: Final answer
    x = 19,852.40

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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.