Home / 42,315.21-63,514.13-20,143.89

Finding the Fourth Proportional to 42,315.21, 63,514.13 and 20,143.89

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Solution

The fourth proportional to 42,315.21, 63,514.13 and 20,143.89 is: 30,235.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,315.21 : 63,514.13 = 20,143.89 : x
  2. Step 2: Convert to fraction form
    42,315.21/63,514.13 = 20,143.89/x
  3. Step 3: Cross multiply
    42,315.21x = 63,514.13 × 20,143.89
  4. Step 4: Simplify right side
    42,315.21x = 1,279,421,547.45
  5. Step 5: Solve for x
    x = 1,279,421,547.45/42,315.21
  6. Step 6: Final answer
    x = 30,235.50

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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.