Home / 12,981.49-19,421.67-9,870.50

Finding the Fourth Proportional to 12,981.49, 19,421.67 and 9,870.50

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Solution

The fourth proportional to 12,981.49, 19,421.67 and 9,870.50 is: 14,767.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.49 : 19,421.67 = 9,870.50 : x
  2. Step 2: Convert to fraction form
    12,981.49/19,421.67 = 9,870.50/x
  3. Step 3: Cross multiply
    12,981.49x = 19,421.67 × 9,870.50
  4. Step 4: Simplify right side
    12,981.49x = 191,701,593.74
  5. Step 5: Solve for x
    x = 191,701,593.74/12,981.49
  6. Step 6: Final answer
    x = 14,767.30

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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.