Home / 15,631.04-21,570.66-8,460.80

Finding the Fourth Proportional to 15,631.04, 21,570.66 and 8,460.80

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Solution

The fourth proportional to 15,631.04, 21,570.66 and 8,460.80 is: 11,675.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,631.04 : 21,570.66 = 8,460.80 : x
  2. Step 2: Convert to fraction form
    15,631.04/21,570.66 = 8,460.80/x
  3. Step 3: Cross multiply
    15,631.04x = 21,570.66 × 8,460.80
  4. Step 4: Simplify right side
    15,631.04x = 182,505,040.13
  5. Step 5: Solve for x
    x = 182,505,040.13/15,631.04
  6. Step 6: Final answer
    x = 11,675.81

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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.