Home / 21,006.05-28,988.88-11,574.61

Finding the Fourth Proportional to 21,006.05, 28,988.88 and 11,574.61

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Solution

The fourth proportional to 21,006.05, 28,988.88 and 11,574.61 is: 15,973.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.05 : 28,988.88 = 11,574.61 : x
  2. Step 2: Convert to fraction form
    21,006.05/28,988.88 = 11,574.61/x
  3. Step 3: Cross multiply
    21,006.05x = 28,988.88 × 11,574.61
  4. Step 4: Simplify right side
    21,006.05x = 335,534,980.34
  5. Step 5: Solve for x
    x = 335,534,980.34/21,006.05
  6. Step 6: Final answer
    x = 15,973.25

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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.