Home / 20,866.12-31,319.69-15,303.63

Finding the Fourth Proportional to 20,866.12, 31,319.69 and 15,303.63

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Solution

The fourth proportional to 20,866.12, 31,319.69 and 15,303.63 is: 22,970.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.12 : 31,319.69 = 15,303.63 : x
  2. Step 2: Convert to fraction form
    20,866.12/31,319.69 = 15,303.63/x
  3. Step 3: Cross multiply
    20,866.12x = 31,319.69 × 15,303.63
  4. Step 4: Simplify right side
    20,866.12x = 479,304,898.32
  5. Step 5: Solve for x
    x = 479,304,898.32/20,866.12
  6. Step 6: Final answer
    x = 22,970.48

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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.