Home / 21,753.12-29,990.76-15,698.28

Finding the Fourth Proportional to 21,753.12, 29,990.76 and 15,698.28

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Solution

The fourth proportional to 21,753.12, 29,990.76 and 15,698.28 is: 21,643.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.12 : 29,990.76 = 15,698.28 : x
  2. Step 2: Convert to fraction form
    21,753.12/29,990.76 = 15,698.28/x
  3. Step 3: Cross multiply
    21,753.12x = 29,990.76 × 15,698.28
  4. Step 4: Simplify right side
    21,753.12x = 470,803,347.89
  5. Step 5: Solve for x
    x = 470,803,347.89/21,753.12
  6. Step 6: Final answer
    x = 21,643.03

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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.