Home / 39,987.72-59,931.18-20,271.24

Finding the Fourth Proportional to 39,987.72, 59,931.18 and 20,271.24

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Solution

The fourth proportional to 39,987.72, 59,931.18 and 20,271.24 is: 30,381.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,987.72 : 59,931.18 = 20,271.24 : x
  2. Step 2: Convert to fraction form
    39,987.72/59,931.18 = 20,271.24/x
  3. Step 3: Cross multiply
    39,987.72x = 59,931.18 × 20,271.24
  4. Step 4: Simplify right side
    39,987.72x = 1,214,879,333.26
  5. Step 5: Solve for x
    x = 1,214,879,333.26/39,987.72
  6. Step 6: Final answer
    x = 30,381.31

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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.