Home / 21,312.57-31,967.70-6,521.49

Finding the Fourth Proportional to 21,312.57, 31,967.70 and 6,521.49

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Solution

The fourth proportional to 21,312.57, 31,967.70 and 6,521.49 is: 9,781.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.57 : 31,967.70 = 6,521.49 : x
  2. Step 2: Convert to fraction form
    21,312.57/31,967.70 = 6,521.49/x
  3. Step 3: Cross multiply
    21,312.57x = 31,967.70 × 6,521.49
  4. Step 4: Simplify right side
    21,312.57x = 208,477,035.87
  5. Step 5: Solve for x
    x = 208,477,035.87/21,312.57
  6. Step 6: Final answer
    x = 9,781.88

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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.