Home / 21,347.70-29,430.18-13,384.62

Finding the Fourth Proportional to 21,347.70, 29,430.18 and 13,384.62

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Solution

The fourth proportional to 21,347.70, 29,430.18 and 13,384.62 is: 18,452.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.70 : 29,430.18 = 13,384.62 : x
  2. Step 2: Convert to fraction form
    21,347.70/29,430.18 = 13,384.62/x
  3. Step 3: Cross multiply
    21,347.70x = 29,430.18 × 13,384.62
  4. Step 4: Simplify right side
    21,347.70x = 393,911,775.83
  5. Step 5: Solve for x
    x = 393,911,775.83/21,347.70
  6. Step 6: Final answer
    x = 18,452.19

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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.