Home / 15,729.63-21,695.52-9,012.81

Finding the Fourth Proportional to 15,729.63, 21,695.52 and 9,012.81

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Solution

The fourth proportional to 15,729.63, 21,695.52 and 9,012.81 is: 12,431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.63 : 21,695.52 = 9,012.81 : x
  2. Step 2: Convert to fraction form
    15,729.63/21,695.52 = 9,012.81/x
  3. Step 3: Cross multiply
    15,729.63x = 21,695.52 × 9,012.81
  4. Step 4: Simplify right side
    15,729.63x = 195,537,599.61
  5. Step 5: Solve for x
    x = 195,537,599.61/15,729.63
  6. Step 6: Final answer
    x = 12,431.16

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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.