Home / 15,381.02-21,221.90-9,410.51

Finding the Fourth Proportional to 15,381.02, 21,221.90 and 9,410.51

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Solution

The fourth proportional to 15,381.02, 21,221.90 and 9,410.51 is: 12,984.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,381.02 : 21,221.90 = 9,410.51 : x
  2. Step 2: Convert to fraction form
    15,381.02/21,221.90 = 9,410.51/x
  3. Step 3: Cross multiply
    15,381.02x = 21,221.90 × 9,410.51
  4. Step 4: Simplify right side
    15,381.02x = 199,708,943.46
  5. Step 5: Solve for x
    x = 199,708,943.46/15,381.02
  6. Step 6: Final answer
    x = 12,984.11

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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.