Home / 21,130.34-29,159.61-11,570.12

Finding the Fourth Proportional to 21,130.34, 29,159.61 and 11,570.12

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Solution

The fourth proportional to 21,130.34, 29,159.61 and 11,570.12 is: 15,966.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.34 : 29,159.61 = 11,570.12 : x
  2. Step 2: Convert to fraction form
    21,130.34/29,159.61 = 11,570.12/x
  3. Step 3: Cross multiply
    21,130.34x = 29,159.61 × 11,570.12
  4. Step 4: Simplify right side
    21,130.34x = 337,380,041.06
  5. Step 5: Solve for x
    x = 337,380,041.06/21,130.34
  6. Step 6: Final answer
    x = 15,966.62

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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.