Home / 30,692.16-42,373.28-28,920.72

Finding the Fourth Proportional to 30,692.16, 42,373.28 and 28,920.72

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Solution

The fourth proportional to 30,692.16, 42,373.28 and 28,920.72 is: 39,927.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,692.16 : 42,373.28 = 28,920.72 : x
  2. Step 2: Convert to fraction form
    30,692.16/42,373.28 = 28,920.72/x
  3. Step 3: Cross multiply
    30,692.16x = 42,373.28 × 28,920.72
  4. Step 4: Simplify right side
    30,692.16x = 1,225,465,766.36
  5. Step 5: Solve for x
    x = 1,225,465,766.36/30,692.16
  6. Step 6: Final answer
    x = 39,927.65

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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.