Home / 21,315.66-31,977.59-9,628.88

Finding the Fourth Proportional to 21,315.66, 31,977.59 and 9,628.88

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Solution

The fourth proportional to 21,315.66, 31,977.59 and 9,628.88 is: 14,445.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.66 : 31,977.59 = 9,628.88 : x
  2. Step 2: Convert to fraction form
    21,315.66/31,977.59 = 9,628.88/x
  3. Step 3: Cross multiply
    21,315.66x = 31,977.59 × 9,628.88
  4. Step 4: Simplify right side
    21,315.66x = 307,908,168.77
  5. Step 5: Solve for x
    x = 307,908,168.77/21,315.66
  6. Step 6: Final answer
    x = 14,445.16

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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.