Home / 39,758.80-59,638.20-21,031.60

Finding the Fourth Proportional to 39,758.80, 59,638.20 and 21,031.60

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Solution

The fourth proportional to 39,758.80, 59,638.20 and 21,031.60 is: 31,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,758.80 : 59,638.20 = 21,031.60 : x
  2. Step 2: Convert to fraction form
    39,758.80/59,638.20 = 21,031.60/x
  3. Step 3: Cross multiply
    39,758.80x = 59,638.20 × 21,031.60
  4. Step 4: Simplify right side
    39,758.80x = 1,254,286,767.12
  5. Step 5: Solve for x
    x = 1,254,286,767.12/39,758.80
  6. Step 6: Final answer
    x = 31,547.40

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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.