Home / 20,830.06-28,746.16-11,398.62

Finding the Fourth Proportional to 20,830.06, 28,746.16 and 11,398.62

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Solution

The fourth proportional to 20,830.06, 28,746.16 and 11,398.62 is: 15,730.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.06 : 28,746.16 = 11,398.62 : x
  2. Step 2: Convert to fraction form
    20,830.06/28,746.16 = 11,398.62/x
  3. Step 3: Cross multiply
    20,830.06x = 28,746.16 × 11,398.62
  4. Step 4: Simplify right side
    20,830.06x = 327,666,554.30
  5. Step 5: Solve for x
    x = 327,666,554.30/20,830.06
  6. Step 6: Final answer
    x = 15,730.47

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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.