Home / 21,271.02-29,350.80-12,319.40

Finding the Fourth Proportional to 21,271.02, 29,350.80 and 12,319.40

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Solution

The fourth proportional to 21,271.02, 29,350.80 and 12,319.40 is: 16,998.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.02 : 29,350.80 = 12,319.40 : x
  2. Step 2: Convert to fraction form
    21,271.02/29,350.80 = 12,319.40/x
  3. Step 3: Cross multiply
    21,271.02x = 29,350.80 × 12,319.40
  4. Step 4: Simplify right side
    21,271.02x = 361,584,098.77
  5. Step 5: Solve for x
    x = 361,584,098.77/21,271.02
  6. Step 6: Final answer
    x = 16,998.91

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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.