Home / 21,255.02-29,330.11-12,303.08

Finding the Fourth Proportional to 21,255.02, 29,330.11 and 12,303.08

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Solution

The fourth proportional to 21,255.02, 29,330.11 and 12,303.08 is: 16,977.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.02 : 29,330.11 = 12,303.08 : x
  2. Step 2: Convert to fraction form
    21,255.02/29,330.11 = 12,303.08/x
  3. Step 3: Cross multiply
    21,255.02x = 29,330.11 × 12,303.08
  4. Step 4: Simplify right side
    21,255.02x = 360,850,689.74
  5. Step 5: Solve for x
    x = 360,850,689.74/21,255.02
  6. Step 6: Final answer
    x = 16,977.20

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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.