Home / 38,678.79-53,336.19-28,628.31

Finding the Fourth Proportional to 38,678.79, 53,336.19 and 28,628.31

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Solution

The fourth proportional to 38,678.79, 53,336.19 and 28,628.31 is: 39,477.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,678.79 : 53,336.19 = 28,628.31 : x
  2. Step 2: Convert to fraction form
    38,678.79/53,336.19 = 28,628.31/x
  3. Step 3: Cross multiply
    38,678.79x = 53,336.19 × 28,628.31
  4. Step 4: Simplify right side
    38,678.79x = 1,526,924,981.54
  5. Step 5: Solve for x
    x = 1,526,924,981.54/38,678.79
  6. Step 6: Final answer
    x = 39,477.06

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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.