Home / 28,255.89-38,992.35-15,509.07

Finding the Fourth Proportional to 28,255.89, 38,992.35 and 15,509.07

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Solution

The fourth proportional to 28,255.89, 38,992.35 and 15,509.07 is: 21,402.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.89 : 38,992.35 = 15,509.07 : x
  2. Step 2: Convert to fraction form
    28,255.89/38,992.35 = 15,509.07/x
  3. Step 3: Cross multiply
    28,255.89x = 38,992.35 × 15,509.07
  4. Step 4: Simplify right side
    28,255.89x = 604,735,085.61
  5. Step 5: Solve for x
    x = 604,735,085.61/28,255.89
  6. Step 6: Final answer
    x = 21,402.09

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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.