Home / 12,870.47-19,271.88-10,358.30

Finding the Fourth Proportional to 12,870.47, 19,271.88 and 10,358.30

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Solution

The fourth proportional to 12,870.47, 19,271.88 and 10,358.30 is: 15,510.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,870.47 : 19,271.88 = 10,358.30 : x
  2. Step 2: Convert to fraction form
    12,870.47/19,271.88 = 10,358.30/x
  3. Step 3: Cross multiply
    12,870.47x = 19,271.88 × 10,358.30
  4. Step 4: Simplify right side
    12,870.47x = 199,623,914.60
  5. Step 5: Solve for x
    x = 199,623,914.60/12,870.47
  6. Step 6: Final answer
    x = 15,510.23

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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.