Home / 18,315.22-25,275.02-9,931.72

Finding the Fourth Proportional to 18,315.22, 25,275.02 and 9,931.72

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Solution

The fourth proportional to 18,315.22, 25,275.02 and 9,931.72 is: 13,705.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315.22 : 25,275.02 = 9,931.72 : x
  2. Step 2: Convert to fraction form
    18,315.22/25,275.02 = 9,931.72/x
  3. Step 3: Cross multiply
    18,315.22x = 25,275.02 × 9,931.72
  4. Step 4: Simplify right side
    18,315.22x = 251,024,421.63
  5. Step 5: Solve for x
    x = 251,024,421.63/18,315.22
  6. Step 6: Final answer
    x = 13,705.78

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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.