Home / 28,988.16-40,003.84-15,740.16

Finding the Fourth Proportional to 28,988.16, 40,003.84 and 15,740.16

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Solution

The fourth proportional to 28,988.16, 40,003.84 and 15,740.16 is: 21,721.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,988.16 : 40,003.84 = 15,740.16 : x
  2. Step 2: Convert to fraction form
    28,988.16/40,003.84 = 15,740.16/x
  3. Step 3: Cross multiply
    28,988.16x = 40,003.84 × 15,740.16
  4. Step 4: Simplify right side
    28,988.16x = 629,666,842.21
  5. Step 5: Solve for x
    x = 629,666,842.21/28,988.16
  6. Step 6: Final answer
    x = 21,721.52

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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.