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Finding the Fourth Proportional to 42,039, 63,069.72 and 15,746.40

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Solution

The fourth proportional to 42,039, 63,069.72 and 15,746.40 is: 23,623.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,039 : 63,069.72 = 15,746.40 : x
  2. Step 2: Convert to fraction form
    42,039/63,069.72 = 15,746.40/x
  3. Step 3: Cross multiply
    42,039x = 63,069.72 × 15,746.40
  4. Step 4: Simplify right side
    42,039x = 993,121,039.01
  5. Step 5: Solve for x
    x = 993,121,039.01/42,039
  6. Step 6: Final answer
    x = 23,623.80

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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.