Home / 21,009.64-31,521.72-9,331.04

Finding the Fourth Proportional to 21,009.64, 31,521.72 and 9,331.04

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Solution

The fourth proportional to 21,009.64, 31,521.72 and 9,331.04 is: 13,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.64 : 31,521.72 = 9,331.04 : x
  2. Step 2: Convert to fraction form
    21,009.64/31,521.72 = 9,331.04/x
  3. Step 3: Cross multiply
    21,009.64x = 31,521.72 × 9,331.04
  4. Step 4: Simplify right side
    21,009.64x = 294,130,430.19
  5. Step 5: Solve for x
    x = 294,130,430.19/21,009.64
  6. Step 6: Final answer
    x = 13,999.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.