Home / 39,065.18-53,909.60-21,159.12

Finding the Fourth Proportional to 39,065.18, 53,909.60 and 21,159.12

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Solution

The fourth proportional to 39,065.18, 53,909.60 and 21,159.12 is: 29,199.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,065.18 : 53,909.60 = 21,159.12 : x
  2. Step 2: Convert to fraction form
    39,065.18/53,909.60 = 21,159.12/x
  3. Step 3: Cross multiply
    39,065.18x = 53,909.60 × 21,159.12
  4. Step 4: Simplify right side
    39,065.18x = 1,140,679,695.55
  5. Step 5: Solve for x
    x = 1,140,679,695.55/39,065.18
  6. Step 6: Final answer
    x = 29,199.40

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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.