Home / 15,688.94-21,639.82-13,314.74

Finding the Fourth Proportional to 15,688.94, 21,639.82 and 13,314.74

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Solution

The fourth proportional to 15,688.94, 21,639.82 and 13,314.74 is: 18,365.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.94 : 21,639.82 = 13,314.74 : x
  2. Step 2: Convert to fraction form
    15,688.94/21,639.82 = 13,314.74/x
  3. Step 3: Cross multiply
    15,688.94x = 21,639.82 × 13,314.74
  4. Step 4: Simplify right side
    15,688.94x = 288,128,576.95
  5. Step 5: Solve for x
    x = 288,128,576.95/15,688.94
  6. Step 6: Final answer
    x = 18,365.08

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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.