Home / 30,977.64-42,784.38-20,888.76

Finding the Fourth Proportional to 30,977.64, 42,784.38 and 20,888.76

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Solution

The fourth proportional to 30,977.64, 42,784.38 and 20,888.76 is: 28,850.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,977.64 : 42,784.38 = 20,888.76 : x
  2. Step 2: Convert to fraction form
    30,977.64/42,784.38 = 20,888.76/x
  3. Step 3: Cross multiply
    30,977.64x = 42,784.38 × 20,888.76
  4. Step 4: Simplify right side
    30,977.64x = 893,712,645.57
  5. Step 5: Solve for x
    x = 893,712,645.57/30,977.64
  6. Step 6: Final answer
    x = 28,850.25

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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.