Home / 42,786.47-64,179.48-11,621.72

Finding the Fourth Proportional to 42,786.47, 64,179.48 and 11,621.72

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Solution

The fourth proportional to 42,786.47, 64,179.48 and 11,621.72 is: 17,432.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,786.47 : 64,179.48 = 11,621.72 : x
  2. Step 2: Convert to fraction form
    42,786.47/64,179.48 = 11,621.72/x
  3. Step 3: Cross multiply
    42,786.47x = 64,179.48 × 11,621.72
  4. Step 4: Simplify right side
    42,786.47x = 745,875,946.31
  5. Step 5: Solve for x
    x = 745,875,946.31/42,786.47
  6. Step 6: Final answer
    x = 17,432.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.