Home / 21,315.60-31,973.10-9,628.80

Finding the Fourth Proportional to 21,315.60, 31,973.10 and 9,628.80

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Solution

The fourth proportional to 21,315.60, 31,973.10 and 9,628.80 is: 14,443.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.60 : 31,973.10 = 9,628.80 : x
  2. Step 2: Convert to fraction form
    21,315.60/31,973.10 = 9,628.80/x
  3. Step 3: Cross multiply
    21,315.60x = 31,973.10 × 9,628.80
  4. Step 4: Simplify right side
    21,315.60x = 307,862,585.28
  5. Step 5: Solve for x
    x = 307,862,585.28/21,315.60
  6. Step 6: Final answer
    x = 14,443.06

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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.