Home / 15,369.76-21,199.98-12,417.40

Finding the Fourth Proportional to 15,369.76, 21,199.98 and 12,417.40

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Solution

The fourth proportional to 15,369.76, 21,199.98 and 12,417.40 is: 17,127.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.76 : 21,199.98 = 12,417.40 : x
  2. Step 2: Convert to fraction form
    15,369.76/21,199.98 = 12,417.40/x
  3. Step 3: Cross multiply
    15,369.76x = 21,199.98 × 12,417.40
  4. Step 4: Simplify right side
    15,369.76x = 263,248,631.65
  5. Step 5: Solve for x
    x = 263,248,631.65/15,369.76
  6. Step 6: Final answer
    x = 17,127.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.