Home / 12,985.40-19,482.90-4,220.60

Finding the Fourth Proportional to 12,985.40, 19,482.90 and 4,220.60

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Solution

The fourth proportional to 12,985.40, 19,482.90 and 4,220.60 is: 6,332.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.40 : 19,482.90 = 4,220.60 : x
  2. Step 2: Convert to fraction form
    12,985.40/19,482.90 = 4,220.60/x
  3. Step 3: Cross multiply
    12,985.40x = 19,482.90 × 4,220.60
  4. Step 4: Simplify right side
    12,985.40x = 82,229,527.74
  5. Step 5: Solve for x
    x = 82,229,527.74/12,985.40
  6. Step 6: Final answer
    x = 6,332.46

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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.