Home / 28,457.19-42,651.23-20,139.64

Finding the Fourth Proportional to 28,457.19, 42,651.23 and 20,139.64

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Solution

The fourth proportional to 28,457.19, 42,651.23 and 20,139.64 is: 30,185.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,457.19 : 42,651.23 = 20,139.64 : x
  2. Step 2: Convert to fraction form
    28,457.19/42,651.23 = 20,139.64/x
  3. Step 3: Cross multiply
    28,457.19x = 42,651.23 × 20,139.64
  4. Step 4: Simplify right side
    28,457.19x = 858,980,210.43
  5. Step 5: Solve for x
    x = 858,980,210.43/28,457.19
  6. Step 6: Final answer
    x = 30,185.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.