Home / 21,018.02-29,006.90-15,703.61

Finding the Fourth Proportional to 21,018.02, 29,006.90 and 15,703.61

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Solution

The fourth proportional to 21,018.02, 29,006.90 and 15,703.61 is: 21,672.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.02 : 29,006.90 = 15,703.61 : x
  2. Step 2: Convert to fraction form
    21,018.02/29,006.90 = 15,703.61/x
  3. Step 3: Cross multiply
    21,018.02x = 29,006.90 × 15,703.61
  4. Step 4: Simplify right side
    21,018.02x = 455,512,821.36
  5. Step 5: Solve for x
    x = 455,512,821.36/21,018.02
  6. Step 6: Final answer
    x = 21,672.49

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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.