Home / 21,862.10-30,169.56-12,430.67

Finding the Fourth Proportional to 21,862.10, 30,169.56 and 12,430.67

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Solution

The fourth proportional to 21,862.10, 30,169.56 and 12,430.67 is: 17,154.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.10 : 30,169.56 = 12,430.67 : x
  2. Step 2: Convert to fraction form
    21,862.10/30,169.56 = 12,430.67/x
  3. Step 3: Cross multiply
    21,862.10x = 30,169.56 × 12,430.67
  4. Step 4: Simplify right side
    21,862.10x = 375,027,740.17
  5. Step 5: Solve for x
    x = 375,027,740.17/21,862.10
  6. Step 6: Final answer
    x = 17,154.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.