Home / 21,312.07-31,966.95-6,520.99

Finding the Fourth Proportional to 21,312.07, 31,966.95 and 6,520.99

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Solution

The fourth proportional to 21,312.07, 31,966.95 and 6,520.99 is: 9,781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.07 : 31,966.95 = 6,520.99 : x
  2. Step 2: Convert to fraction form
    21,312.07/31,966.95 = 6,520.99/x
  3. Step 3: Cross multiply
    21,312.07x = 31,966.95 × 6,520.99
  4. Step 4: Simplify right side
    21,312.07x = 208,456,161.28
  5. Step 5: Solve for x
    x = 208,456,161.28/21,312.07
  6. Step 6: Final answer
    x = 9,781.13

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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.