Home / 20,829.32-31,082.53-18,966.68

Finding the Fourth Proportional to 20,829.32, 31,082.53 and 18,966.68

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Solution

The fourth proportional to 20,829.32, 31,082.53 and 18,966.68 is: 28,303.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.32 : 31,082.53 = 18,966.68 : x
  2. Step 2: Convert to fraction form
    20,829.32/31,082.53 = 18,966.68/x
  3. Step 3: Cross multiply
    20,829.32x = 31,082.53 × 18,966.68
  4. Step 4: Simplify right side
    20,829.32x = 589,532,400.10
  5. Step 5: Solve for x
    x = 589,532,400.10/20,829.32
  6. Step 6: Final answer
    x = 28,303.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.