Home / 42,620.80-63,931.20-13,038.70

Finding the Fourth Proportional to 42,620.80, 63,931.20 and 13,038.70

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Solution

The fourth proportional to 42,620.80, 63,931.20 and 13,038.70 is: 19,558.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,620.80 : 63,931.20 = 13,038.70 : x
  2. Step 2: Convert to fraction form
    42,620.80/63,931.20 = 13,038.70/x
  3. Step 3: Cross multiply
    42,620.80x = 63,931.20 × 13,038.70
  4. Step 4: Simplify right side
    42,620.80x = 833,579,737.44
  5. Step 5: Solve for x
    x = 833,579,737.44/42,620.80
  6. Step 6: Final answer
    x = 19,558.05

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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.