Home / 21,001.57-28,980.45-11,570.13

Finding the Fourth Proportional to 21,001.57, 28,980.45 and 11,570.13

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Solution

The fourth proportional to 21,001.57, 28,980.45 and 11,570.13 is: 15,965.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.57 : 28,980.45 = 11,570.13 : x
  2. Step 2: Convert to fraction form
    21,001.57/28,980.45 = 11,570.13/x
  3. Step 3: Cross multiply
    21,001.57x = 28,980.45 × 11,570.13
  4. Step 4: Simplify right side
    21,001.57x = 335,307,573.96
  5. Step 5: Solve for x
    x = 335,307,573.96/21,001.57
  6. Step 6: Final answer
    x = 15,965.84

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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.