Home / 21,030.40-31,543.53-8,551.17

Finding the Fourth Proportional to 21,030.40, 31,543.53 and 8,551.17

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Solution

The fourth proportional to 21,030.40, 31,543.53 and 8,551.17 is: 12,825.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.40 : 31,543.53 = 8,551.17 : x
  2. Step 2: Convert to fraction form
    21,030.40/31,543.53 = 8,551.17/x
  3. Step 3: Cross multiply
    21,030.40x = 31,543.53 × 8,551.17
  4. Step 4: Simplify right side
    21,030.40x = 269,734,055.36
  5. Step 5: Solve for x
    x = 269,734,055.36/21,030.40
  6. Step 6: Final answer
    x = 12,825.91

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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.