Home / 30,871.56-46,307.36-8,687.20

Finding the Fourth Proportional to 30,871.56, 46,307.36 and 8,687.20

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Solution

The fourth proportional to 30,871.56, 46,307.36 and 8,687.20 is: 13,030.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,871.56 : 46,307.36 = 8,687.20 : x
  2. Step 2: Convert to fraction form
    30,871.56/46,307.36 = 8,687.20/x
  3. Step 3: Cross multiply
    30,871.56x = 46,307.36 × 8,687.20
  4. Step 4: Simplify right side
    30,871.56x = 402,281,297.79
  5. Step 5: Solve for x
    x = 402,281,297.79/30,871.56
  6. Step 6: Final answer
    x = 13,030.81

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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.