Home / 21,012.60-28,999.08-11,582.76

Finding the Fourth Proportional to 21,012.60, 28,999.08 and 11,582.76

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Solution

The fourth proportional to 21,012.60, 28,999.08 and 11,582.76 is: 15,985.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.60 : 28,999.08 = 11,582.76 : x
  2. Step 2: Convert to fraction form
    21,012.60/28,999.08 = 11,582.76/x
  3. Step 3: Cross multiply
    21,012.60x = 28,999.08 × 11,582.76
  4. Step 4: Simplify right side
    21,012.60x = 335,889,383.86
  5. Step 5: Solve for x
    x = 335,889,383.86/21,012.60
  6. Step 6: Final answer
    x = 15,985.14

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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.