Home / 12,985,205.40-19,477,808.10-12,489,193.80

Finding the Fourth Proportional to 12,985,205.40, 19,477,808.10 and 12,489,193.80

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Solution

The fourth proportional to 12,985,205.40, 19,477,808.10 and 12,489,193.80 is: 18,733,790.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985,205.40 : 19,477,808.10 = 12,489,193.80 : x
  2. Step 2: Convert to fraction form
    12,985,205.40/19,477,808.10 = 12,489,193.80/x
  3. Step 3: Cross multiply
    12,985,205.40x = 19,477,808.10 × 12,489,193.80
  4. Step 4: Simplify right side
    12,985,205.40x = 243,262,120,160,109.81
  5. Step 5: Solve for x
    x = 243,262,120,160,109.81/12,985,205.40
  6. Step 6: Final answer
    x = 18,733,790.70

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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.