Home / 28,140.40-42,210.60-7,363.90

Finding the Fourth Proportional to 28,140.40, 42,210.60 and 7,363.90

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Solution

The fourth proportional to 28,140.40, 42,210.60 and 7,363.90 is: 11,045.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.40 : 42,210.60 = 7,363.90 : x
  2. Step 2: Convert to fraction form
    28,140.40/42,210.60 = 7,363.90/x
  3. Step 3: Cross multiply
    28,140.40x = 42,210.60 × 7,363.90
  4. Step 4: Simplify right side
    28,140.40x = 310,834,637.34
  5. Step 5: Solve for x
    x = 310,834,637.34/28,140.40
  6. Step 6: Final answer
    x = 11,045.85

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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.