Home / 28,448.40-42,637.98-20,130.81

Finding the Fourth Proportional to 28,448.40, 42,637.98 and 20,130.81

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Solution

The fourth proportional to 28,448.40, 42,637.98 and 20,130.81 is: 30,171.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.40 : 42,637.98 = 20,130.81 : x
  2. Step 2: Convert to fraction form
    28,448.40/42,637.98 = 20,130.81/x
  3. Step 3: Cross multiply
    28,448.40x = 42,637.98 × 20,130.81
  4. Step 4: Simplify right side
    28,448.40x = 858,337,074.16
  5. Step 5: Solve for x
    x = 858,337,074.16/28,448.40
  6. Step 6: Final answer
    x = 30,171.72

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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.