Home / 15,717.60-21,671.28-11,518.56

Finding the Fourth Proportional to 15,717.60, 21,671.28 and 11,518.56

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Solution

The fourth proportional to 15,717.60, 21,671.28 and 11,518.56 is: 15,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.60 : 21,671.28 = 11,518.56 : x
  2. Step 2: Convert to fraction form
    15,717.60/21,671.28 = 11,518.56/x
  3. Step 3: Cross multiply
    15,717.60x = 21,671.28 × 11,518.56
  4. Step 4: Simplify right side
    15,717.60x = 249,621,938.96
  5. Step 5: Solve for x
    x = 249,621,938.96/15,717.60
  6. Step 6: Final answer
    x = 15,881.68

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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.