Home / 15,483.80-21,365.70-12,820.52

Finding the Fourth Proportional to 15,483.80, 21,365.70 and 12,820.52

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Solution

The fourth proportional to 15,483.80, 21,365.70 and 12,820.52 is: 17,690.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,483.80 : 21,365.70 = 12,820.52 : x
  2. Step 2: Convert to fraction form
    15,483.80/21,365.70 = 12,820.52/x
  3. Step 3: Cross multiply
    15,483.80x = 21,365.70 × 12,820.52
  4. Step 4: Simplify right side
    15,483.80x = 273,919,384.16
  5. Step 5: Solve for x
    x = 273,919,384.16/15,483.80
  6. Step 6: Final answer
    x = 17,690.71

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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.