Home / 21,538,012.80-32,307,019.20-12,468,086.40

Finding the Fourth Proportional to 21,538,012.80, 32,307,019.20 and 12,468,086.40

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Solution

The fourth proportional to 21,538,012.80, 32,307,019.20 and 12,468,086.40 is: 18,702,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538,012.80 : 32,307,019.20 = 12,468,086.40 : x
  2. Step 2: Convert to fraction form
    21,538,012.80/32,307,019.20 = 12,468,086.40/x
  3. Step 3: Cross multiply
    21,538,012.80x = 32,307,019.20 × 12,468,086.40
  4. Step 4: Simplify right side
    21,538,012.80x = 402,806,706,712,058.88
  5. Step 5: Solve for x
    x = 402,806,706,712,058.88/21,538,012.80
  6. Step 6: Final answer
    x = 18,702,129.60

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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.