Home / 30,387.51-45,598.28-12,870.45

Finding the Fourth Proportional to 30,387.51, 45,598.28 and 12,870.45

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Solution

The fourth proportional to 30,387.51, 45,598.28 and 12,870.45 is: 19,312.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387.51 : 45,598.28 = 12,870.45 : x
  2. Step 2: Convert to fraction form
    30,387.51/45,598.28 = 12,870.45/x
  3. Step 3: Cross multiply
    30,387.51x = 45,598.28 × 12,870.45
  4. Step 4: Simplify right side
    30,387.51x = 586,870,318.47
  5. Step 5: Solve for x
    x = 586,870,318.47/30,387.51
  6. Step 6: Final answer
    x = 19,312.88

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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.