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Finding the Fourth Proportional to 39,646.40, 59,455.20 and 19,918.40

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Solution

The fourth proportional to 39,646.40, 59,455.20 and 19,918.40 is: 29,870.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,646.40 : 59,455.20 = 19,918.40 : x
  2. Step 2: Convert to fraction form
    39,646.40/59,455.20 = 19,918.40/x
  3. Step 3: Cross multiply
    39,646.40x = 59,455.20 × 19,918.40
  4. Step 4: Simplify right side
    39,646.40x = 1,184,252,455.68
  5. Step 5: Solve for x
    x = 1,184,252,455.68/39,646.40
  6. Step 6: Final answer
    x = 29,870.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.