Home / 21,009.03-28,999.89-18,767.01

Finding the Fourth Proportional to 21,009.03, 28,999.89 and 18,767.01

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Solution

The fourth proportional to 21,009.03, 28,999.89 and 18,767.01 is: 25,905.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.03 : 28,999.89 = 18,767.01 : x
  2. Step 2: Convert to fraction form
    21,009.03/28,999.89 = 18,767.01/x
  3. Step 3: Cross multiply
    21,009.03x = 28,999.89 × 18,767.01
  4. Step 4: Simplify right side
    21,009.03x = 544,241,225.63
  5. Step 5: Solve for x
    x = 544,241,225.63/21,009.03
  6. Step 6: Final answer
    x = 25,905.11

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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.