Home / 21,065.64-29,070.34-11,505.48

Finding the Fourth Proportional to 21,065.64, 29,070.34 and 11,505.48

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Solution

The fourth proportional to 21,065.64, 29,070.34 and 11,505.48 is: 15,877.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.64 : 29,070.34 = 11,505.48 : x
  2. Step 2: Convert to fraction form
    21,065.64/29,070.34 = 11,505.48/x
  3. Step 3: Cross multiply
    21,065.64x = 29,070.34 × 11,505.48
  4. Step 4: Simplify right side
    21,065.64x = 334,468,215.46
  5. Step 5: Solve for x
    x = 334,468,215.46/21,065.64
  6. Step 6: Final answer
    x = 15,877.43

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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.