Home / 28,261.28-39,011.60-21,208.16

Finding the Fourth Proportional to 28,261.28, 39,011.60 and 21,208.16

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Solution

The fourth proportional to 28,261.28, 39,011.60 and 21,208.16 is: 29,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,261.28 : 39,011.60 = 21,208.16 : x
  2. Step 2: Convert to fraction form
    28,261.28/39,011.60 = 21,208.16/x
  3. Step 3: Cross multiply
    28,261.28x = 39,011.60 × 21,208.16
  4. Step 4: Simplify right side
    28,261.28x = 827,364,254.66
  5. Step 5: Solve for x
    x = 827,364,254.66/28,261.28
  6. Step 6: Final answer
    x = 29,275.54

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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.