Home / 15,815.66-21,828.64-10,157.55

Finding the Fourth Proportional to 15,815.66, 21,828.64 and 10,157.55

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Solution

The fourth proportional to 15,815.66, 21,828.64 and 10,157.55 is: 14,019.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.66 : 21,828.64 = 10,157.55 : x
  2. Step 2: Convert to fraction form
    15,815.66/21,828.64 = 10,157.55/x
  3. Step 3: Cross multiply
    15,815.66x = 21,828.64 × 10,157.55
  4. Step 4: Simplify right side
    15,815.66x = 221,725,536.81
  5. Step 5: Solve for x
    x = 221,725,536.81/15,815.66
  6. Step 6: Final answer
    x = 14,019.37

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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.