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Finding the Fourth Proportional to 40,700.80, 61,030.08 and 12,995.20

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Solution

The fourth proportional to 40,700.80, 61,030.08 and 12,995.20 is: 19,486.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,700.80 : 61,030.08 = 12,995.20 : x
  2. Step 2: Convert to fraction form
    40,700.80/61,030.08 = 12,995.20/x
  3. Step 3: Cross multiply
    40,700.80x = 61,030.08 × 12,995.20
  4. Step 4: Simplify right side
    40,700.80x = 793,098,095.62
  5. Step 5: Solve for x
    x = 793,098,095.62/40,700.80
  6. Step 6: Final answer
    x = 19,486.06

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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.