Home / 28,289.72-39,039.86-15,714.47

Finding the Fourth Proportional to 28,289.72, 39,039.86 and 15,714.47

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Solution

The fourth proportional to 28,289.72, 39,039.86 and 15,714.47 is: 21,686.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.72 : 39,039.86 = 15,714.47 : x
  2. Step 2: Convert to fraction form
    28,289.72/39,039.86 = 15,714.47/x
  3. Step 3: Cross multiply
    28,289.72x = 39,039.86 × 15,714.47
  4. Step 4: Simplify right side
    28,289.72x = 613,490,845.66
  5. Step 5: Solve for x
    x = 613,490,845.66/28,289.72
  6. Step 6: Final answer
    x = 21,686.00

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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.