Home / 21,762.96-30,030.50-12,813.28

Finding the Fourth Proportional to 21,762.96, 30,030.50 and 12,813.28

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Solution

The fourth proportional to 21,762.96, 30,030.50 and 12,813.28 is: 17,680.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,762.96 : 30,030.50 = 12,813.28 : x
  2. Step 2: Convert to fraction form
    21,762.96/30,030.50 = 12,813.28/x
  3. Step 3: Cross multiply
    21,762.96x = 30,030.50 × 12,813.28
  4. Step 4: Simplify right side
    21,762.96x = 384,789,205.04
  5. Step 5: Solve for x
    x = 384,789,205.04/21,762.96
  6. Step 6: Final answer
    x = 17,680.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.