Home / 30,513.77-42,128.58-20,950.58

Finding the Fourth Proportional to 30,513.77, 42,128.58 and 20,950.58

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Solution

The fourth proportional to 30,513.77, 42,128.58 and 20,950.58 is: 28,925.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,513.77 : 42,128.58 = 20,950.58 : x
  2. Step 2: Convert to fraction form
    30,513.77/42,128.58 = 20,950.58/x
  3. Step 3: Cross multiply
    30,513.77x = 42,128.58 × 20,950.58
  4. Step 4: Simplify right side
    30,513.77x = 882,618,185.58
  5. Step 5: Solve for x
    x = 882,618,185.58/30,513.77
  6. Step 6: Final answer
    x = 28,925.24

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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.