Home / 12,985.80-19,457.10-6,397.80

Finding the Fourth Proportional to 12,985.80, 19,457.10 and 6,397.80

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Solution

The fourth proportional to 12,985.80, 19,457.10 and 6,397.80 is: 9,586.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.80 : 19,457.10 = 6,397.80 : x
  2. Step 2: Convert to fraction form
    12,985.80/19,457.10 = 6,397.80/x
  3. Step 3: Cross multiply
    12,985.80x = 19,457.10 × 6,397.80
  4. Step 4: Simplify right side
    12,985.80x = 124,482,634.38
  5. Step 5: Solve for x
    x = 124,482,634.38/12,985.80
  6. Step 6: Final answer
    x = 9,586.06

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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.