Home / 15,788.16-21,784.32-11,011.68

Finding the Fourth Proportional to 15,788.16, 21,784.32 and 11,011.68

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Solution

The fourth proportional to 15,788.16, 21,784.32 and 11,011.68 is: 15,193.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.16 : 21,784.32 = 11,011.68 : x
  2. Step 2: Convert to fraction form
    15,788.16/21,784.32 = 11,011.68/x
  3. Step 3: Cross multiply
    15,788.16x = 21,784.32 × 11,011.68
  4. Step 4: Simplify right side
    15,788.16x = 239,881,960.86
  5. Step 5: Solve for x
    x = 239,881,960.86/15,788.16
  6. Step 6: Final answer
    x = 15,193.79

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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.