Home / 21,260.40-31,890.60-7,406.16

Finding the Fourth Proportional to 21,260.40, 31,890.60 and 7,406.16

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Solution

The fourth proportional to 21,260.40, 31,890.60 and 7,406.16 is: 11,109.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.40 : 31,890.60 = 7,406.16 : x
  2. Step 2: Convert to fraction form
    21,260.40/31,890.60 = 7,406.16/x
  3. Step 3: Cross multiply
    21,260.40x = 31,890.60 × 7,406.16
  4. Step 4: Simplify right side
    21,260.40x = 236,186,886.10
  5. Step 5: Solve for x
    x = 236,186,886.10/21,260.40
  6. Step 6: Final answer
    x = 11,109.24

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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.