Home / 21,303.02-31,919.22-12,957.80

Finding the Fourth Proportional to 21,303.02, 31,919.22 and 12,957.80

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Solution

The fourth proportional to 21,303.02, 31,919.22 and 12,957.80 is: 19,415.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.02 : 31,919.22 = 12,957.80 : x
  2. Step 2: Convert to fraction form
    21,303.02/31,919.22 = 12,957.80/x
  3. Step 3: Cross multiply
    21,303.02x = 31,919.22 × 12,957.80
  4. Step 4: Simplify right side
    21,303.02x = 413,602,709.32
  5. Step 5: Solve for x
    x = 413,602,709.32/21,303.02
  6. Step 6: Final answer
    x = 19,415.21

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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.