Home / 15,415.36-21,250.56-11,109.76

Finding the Fourth Proportional to 15,415.36, 21,250.56 and 11,109.76

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Solution

The fourth proportional to 15,415.36, 21,250.56 and 11,109.76 is: 15,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.36 : 21,250.56 = 11,109.76 : x
  2. Step 2: Convert to fraction form
    15,415.36/21,250.56 = 11,109.76/x
  3. Step 3: Cross multiply
    15,415.36x = 21,250.56 × 11,109.76
  4. Step 4: Simplify right side
    15,415.36x = 236,088,621.47
  5. Step 5: Solve for x
    x = 236,088,621.47/15,415.36
  6. Step 6: Final answer
    x = 15,315.15

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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.