Home / 43,139.09-64,708.68-13,559.51

Finding the Fourth Proportional to 43,139.09, 64,708.68 and 13,559.51

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Solution

The fourth proportional to 43,139.09, 64,708.68 and 13,559.51 is: 20,339.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,139.09 : 64,708.68 = 13,559.51 : x
  2. Step 2: Convert to fraction form
    43,139.09/64,708.68 = 13,559.51/x
  3. Step 3: Cross multiply
    43,139.09x = 64,708.68 × 13,559.51
  4. Step 4: Simplify right side
    43,139.09x = 877,417,993.55
  5. Step 5: Solve for x
    x = 877,417,993.55/43,139.09
  6. Step 6: Final answer
    x = 20,339.28

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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.