Home / 28,145.76-38,841.30-15,570.51

Finding the Fourth Proportional to 28,145.76, 38,841.30 and 15,570.51

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Solution

The fourth proportional to 28,145.76, 38,841.30 and 15,570.51 is: 21,487.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.76 : 38,841.30 = 15,570.51 : x
  2. Step 2: Convert to fraction form
    28,145.76/38,841.30 = 15,570.51/x
  3. Step 3: Cross multiply
    28,145.76x = 38,841.30 × 15,570.51
  4. Step 4: Simplify right side
    28,145.76x = 604,778,850.06
  5. Step 5: Solve for x
    x = 604,778,850.06/28,145.76
  6. Step 6: Final answer
    x = 21,487.39

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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.