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Finding the Fourth Proportional to 21,746.20, 32,570.70 and 21,260.20

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Solution

The fourth proportional to 21,746.20, 32,570.70 and 21,260.20 is: 31,842.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,746.20 : 32,570.70 = 21,260.20 : x
  2. Step 2: Convert to fraction form
    21,746.20/32,570.70 = 21,260.20/x
  3. Step 3: Cross multiply
    21,746.20x = 32,570.70 × 21,260.20
  4. Step 4: Simplify right side
    21,746.20x = 692,459,596.14
  5. Step 5: Solve for x
    x = 692,459,596.14/21,746.20
  6. Step 6: Final answer
    x = 31,842.79

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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.