Finding the Fourth Proportional to 15,128,599.05, 20,875,856.84 and 8,513,071.98
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Solution
The fourth proportional to 15,128,599.05, 20,875,856.84 and 8,513,071.98 is: 11,747,133.45
Step by Step Solution
- Step 1: Write the proportion equation
15,128,599.05 : 20,875,856.84 = 8,513,071.98 : x - Step 2: Convert to fraction form
15,128,599.05/20,875,856.84 = 8,513,071.98/x - Step 3: Cross multiply
15,128,599.05x = 20,875,856.84 × 8,513,071.98 - Step 4: Simplify right side
15,128,599.05x = 177,717,671,923,095.34 - Step 5: Solve for x
x = 177,717,671,923,095.34/15,128,599.05 - Step 6: Final answer
x = 11,747,133.45
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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.