Home / 21,013.04-28,998.12-12,060.31

Finding the Fourth Proportional to 21,013.04, 28,998.12 and 12,060.31

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Solution

The fourth proportional to 21,013.04, 28,998.12 and 12,060.31 is: 16,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.04 : 28,998.12 = 12,060.31 : x
  2. Step 2: Convert to fraction form
    21,013.04/28,998.12 = 12,060.31/x
  3. Step 3: Cross multiply
    21,013.04x = 28,998.12 × 12,060.31
  4. Step 4: Simplify right side
    21,013.04x = 349,726,316.62
  5. Step 5: Solve for x
    x = 349,726,316.62/21,013.04
  6. Step 6: Final answer
    x = 16,643.30

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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.