Home / 15,686.45-21,636.38-13,312.24

Finding the Fourth Proportional to 15,686.45, 21,636.38 and 13,312.24

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Solution

The fourth proportional to 15,686.45, 21,636.38 and 13,312.24 is: 18,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.45 : 21,636.38 = 13,312.24 : x
  2. Step 2: Convert to fraction form
    15,686.45/21,636.38 = 13,312.24/x
  3. Step 3: Cross multiply
    15,686.45x = 21,636.38 × 13,312.24
  4. Step 4: Simplify right side
    15,686.45x = 288,028,683.29
  5. Step 5: Solve for x
    x = 288,028,683.29/15,686.45
  6. Step 6: Final answer
    x = 18,361.62

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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.