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Finding the Fourth Proportional to 42,030.20, 63,045.02 and 12,448.20

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Solution

The fourth proportional to 42,030.20, 63,045.02 and 12,448.20 is: 18,672.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,030.20 : 63,045.02 = 12,448.20 : x
  2. Step 2: Convert to fraction form
    42,030.20/63,045.02 = 12,448.20/x
  3. Step 3: Cross multiply
    42,030.20x = 63,045.02 × 12,448.20
  4. Step 4: Simplify right side
    42,030.20x = 784,797,017.96
  5. Step 5: Solve for x
    x = 784,797,017.96/42,030.20
  6. Step 6: Final answer
    x = 18,672.22

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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.