Home / 21,621.80-32,384.10-13,165.40

Finding the Fourth Proportional to 21,621.80, 32,384.10 and 13,165.40

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Solution

The fourth proportional to 21,621.80, 32,384.10 and 13,165.40 is: 19,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.80 : 32,384.10 = 13,165.40 : x
  2. Step 2: Convert to fraction form
    21,621.80/32,384.10 = 13,165.40/x
  3. Step 3: Cross multiply
    21,621.80x = 32,384.10 × 13,165.40
  4. Step 4: Simplify right side
    21,621.80x = 426,349,630.14
  5. Step 5: Solve for x
    x = 426,349,630.14/21,621.80
  6. Step 6: Final answer
    x = 19,718.51

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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.