Home / 28,135.52-38,827.80-15,561.08

Finding the Fourth Proportional to 28,135.52, 38,827.80 and 15,561.08

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Solution

The fourth proportional to 28,135.52, 38,827.80 and 15,561.08 is: 21,474.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.52 : 38,827.80 = 15,561.08 : x
  2. Step 2: Convert to fraction form
    28,135.52/38,827.80 = 15,561.08/x
  3. Step 3: Cross multiply
    28,135.52x = 38,827.80 × 15,561.08
  4. Step 4: Simplify right side
    28,135.52x = 604,202,502.02
  5. Step 5: Solve for x
    x = 604,202,502.02/28,135.52
  6. Step 6: Final answer
    x = 21,474.72

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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.