Home / 15,564.08-21,478.41-8,490.51

Finding the Fourth Proportional to 15,564.08, 21,478.41 and 8,490.51

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Solution

The fourth proportional to 15,564.08, 21,478.41 and 8,490.51 is: 11,716.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.08 : 21,478.41 = 8,490.51 : x
  2. Step 2: Convert to fraction form
    15,564.08/21,478.41 = 8,490.51/x
  3. Step 3: Cross multiply
    15,564.08x = 21,478.41 × 8,490.51
  4. Step 4: Simplify right side
    15,564.08x = 182,362,654.89
  5. Step 5: Solve for x
    x = 182,362,654.89/15,564.08
  6. Step 6: Final answer
    x = 11,716.89

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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.