Home / 19,820.57-29,710.70-12,430.18

Finding the Fourth Proportional to 19,820.57, 29,710.70 and 12,430.18

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Solution

The fourth proportional to 19,820.57, 29,710.70 and 12,430.18 is: 18,632.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,820.57 : 29,710.70 = 12,430.18 : x
  2. Step 2: Convert to fraction form
    19,820.57/29,710.70 = 12,430.18/x
  3. Step 3: Cross multiply
    19,820.57x = 29,710.70 × 12,430.18
  4. Step 4: Simplify right side
    19,820.57x = 369,309,203.40
  5. Step 5: Solve for x
    x = 369,309,203.40/19,820.57
  6. Step 6: Final answer
    x = 18,632.63

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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.