Home / 21,435.90-29,580.85-11,875.40

Finding the Fourth Proportional to 21,435.90, 29,580.85 and 11,875.40

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Solution

The fourth proportional to 21,435.90, 29,580.85 and 11,875.40 is: 16,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.90 : 29,580.85 = 11,875.40 : x
  2. Step 2: Convert to fraction form
    21,435.90/29,580.85 = 11,875.40/x
  3. Step 3: Cross multiply
    21,435.90x = 29,580.85 × 11,875.40
  4. Step 4: Simplify right side
    21,435.90x = 351,284,426.09
  5. Step 5: Solve for x
    x = 351,284,426.09/21,435.90
  6. Step 6: Final answer
    x = 16,387.67

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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.