Home / 15,216.40-21,090.66-14,340.39

Finding the Fourth Proportional to 15,216.40, 21,090.66 and 14,340.39

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Solution

The fourth proportional to 15,216.40, 21,090.66 and 14,340.39 is: 19,876.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,216.40 : 21,090.66 = 14,340.39 : x
  2. Step 2: Convert to fraction form
    15,216.40/21,090.66 = 14,340.39/x
  3. Step 3: Cross multiply
    15,216.40x = 21,090.66 × 14,340.39
  4. Step 4: Simplify right side
    15,216.40x = 302,448,289.76
  5. Step 5: Solve for x
    x = 302,448,289.76/15,216.40
  6. Step 6: Final answer
    x = 19,876.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.