Home / 15,564.36-21,478.76-8,490.76

Finding the Fourth Proportional to 15,564.36, 21,478.76 and 8,490.76

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Solution

The fourth proportional to 15,564.36, 21,478.76 and 8,490.76 is: 11,717.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.36 : 21,478.76 = 8,490.76 : x
  2. Step 2: Convert to fraction form
    15,564.36/21,478.76 = 8,490.76/x
  3. Step 3: Cross multiply
    15,564.36x = 21,478.76 × 8,490.76
  4. Step 4: Simplify right side
    15,564.36x = 182,370,996.26
  5. Step 5: Solve for x
    x = 182,370,996.26/15,564.36
  6. Step 6: Final answer
    x = 11,717.22

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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.