Home / 15,913.19-21,790.45-15,285.80

Finding the Fourth Proportional to 15,913.19, 21,790.45 and 15,285.80

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Solution

The fourth proportional to 15,913.19, 21,790.45 and 15,285.80 is: 20,931.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,913.19 : 21,790.45 = 15,285.80 : x
  2. Step 2: Convert to fraction form
    15,913.19/21,790.45 = 15,285.80/x
  3. Step 3: Cross multiply
    15,913.19x = 21,790.45 × 15,285.80
  4. Step 4: Simplify right side
    15,913.19x = 333,084,366.50
  5. Step 5: Solve for x
    x = 333,084,366.50/15,913.19
  6. Step 6: Final answer
    x = 20,931.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.