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Finding the Fourth Proportional to 21,803.70, 32,705.55 and 12,946.35

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Solution

The fourth proportional to 21,803.70, 32,705.55 and 12,946.35 is: 19,419.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.70 : 32,705.55 = 12,946.35 : x
  2. Step 2: Convert to fraction form
    21,803.70/32,705.55 = 12,946.35/x
  3. Step 3: Cross multiply
    21,803.70x = 32,705.55 × 12,946.35
  4. Step 4: Simplify right side
    21,803.70x = 423,417,497.24
  5. Step 5: Solve for x
    x = 423,417,497.24/21,803.70
  6. Step 6: Final answer
    x = 19,419.53

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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.