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Finding the Fourth Proportional to 21,859.76, 32,822.36 and 12,510.32

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Solution

The fourth proportional to 21,859.76, 32,822.36 and 12,510.32 is: 18,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.76 : 32,822.36 = 12,510.32 : x
  2. Step 2: Convert to fraction form
    21,859.76/32,822.36 = 12,510.32/x
  3. Step 3: Cross multiply
    21,859.76x = 32,822.36 × 12,510.32
  4. Step 4: Simplify right side
    21,859.76x = 410,618,226.76
  5. Step 5: Solve for x
    x = 410,618,226.76/21,859.76
  6. Step 6: Final answer
    x = 18,784.21

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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.