Home / 15,117.79-20,851.18-10,642.81

Finding the Fourth Proportional to 15,117.79, 20,851.18 and 10,642.81

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Solution

The fourth proportional to 15,117.79, 20,851.18 and 10,642.81 is: 14,679.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.79 : 20,851.18 = 10,642.81 : x
  2. Step 2: Convert to fraction form
    15,117.79/20,851.18 = 10,642.81/x
  3. Step 3: Cross multiply
    15,117.79x = 20,851.18 × 10,642.81
  4. Step 4: Simplify right side
    15,117.79x = 221,915,147.02
  5. Step 5: Solve for x
    x = 221,915,147.02/15,117.79
  6. Step 6: Final answer
    x = 14,679.07

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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.